2. The correct answer **is** (A). 3. The correct answer **is** ( C ). 4. The correct answer **is** ( E ). The locus **of** points 4" from a given line **is** a cylindrical surface **of** **radius** 4" with the given line as axis. The locus **of** points 4" from a given point **is** a **sphere** **of** 4" **radius** with the given point as center. The intersection **of** these two loci **is** a circle.

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This study aimed to investigate the bacterial contamination of flake and cube ice being used daily in the community. Thirty-one ice samples were collected from different areas in the city of Can Tho, Vietnam. The enumeration of total aerobic mesophilic counts, presence of coliforms and Escherichia coli (E. coli) and determination of antibiotics resistance of E. coli isolates were examined. The results indicated that total aerobic mesophilic counts ranged from 2.5 to 6.2 log CFU/mL and there was significant difference between the total aerobic mesophilic counts found in flake and cube ice (p < 0.05). Coliforms and E. coli present on the flake and cube ice samples were 93.55 % and 58.06 %, respectively. A total of 39 E. coli isolates were tested against fifteen antibiotics, 74.36 % of which were multi-drug resistant to three to thirteen antibiotics. High prevalence of resistance was to Ampicillin (79.49 %), Cefotaxime (69.23 %), Ceftazidime (46.15 %), Tetracycline (56.41 %), Sulfamethoxazole/Trimethoprim (46.15 %), Colistin (20.51 %), etc. As E. coli is a hygiene indicator and a candidate vehicle for the transfer of antibiotic resistance gene, it is highly recommended using clean and potable water in ice making as well as preventing the spread of antibiotic resistant bacteria.

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9.4 Mass per 400 mL **of** Mortar—When the quantity **of** mixing water has been found that produces a flow **of** 87 1 ⁄ 2 6 7 1 ⁄ 2 %, immediately determine the mass per 400 mL **of** mortar, using the mortar remaining **in** the mixing bowl after the flow has been determined. **In** the determination **of** the mass per 400 mL, do not use the portion **of** the mortar used **in** the flow determination. Using the spoon, place the mortar gently into the 400–ml measure **in** three equal layers. Tamp each layer 20 times around the inner surface **of** the measure. For the final layer **of** mortar, overfill the 400–ml measure approximately 20 mm. The position **of** the tamper shall be that: the broad **side** **of** the tamper **is** parallel to the **radius** and **is** perpendicular to the inner surface **of** the measure. Each layer **is** tamped **in** one complete revolution (rotation) with only sufficient pressure to adequately fill the measure and eliminate voids within the mortar. After the measure has been filled and tamped **in** the above prescribed manner, tap the sides **of** the measure lightly with the **side** **of** the tapping stick, one each at five different points at approximately equal spacing around the outside **of** the measure, **in** order to preclude entrapment **of** extraneous air (Note 3). No obvious space shall be left between the mortar and the inner surface **of** the measure as a result **of** the tamping operation. Then cut the mortar off to a plane surface, flush with the top **of** the measure, by drawing the straightedge with a sawing motion across the top **of** the measure, making two passes over the entire surface, the second pass being made at right angles to the first. If, **in** the striking-off operation, loose sand grains cause the straightedge to ride above the top surface **of** the measure, these grains shall be removed, and the operation repeated. Complete the entire operation **of** filling and striking off the measure within 1 1 ⁄ 2 min. Wipe off all mortar and water adhering to the outside **of** the measure. Determine the mass **of** the measure and its contents. Subtract the mass **of** the container, and record the mass **of** the mortar **in** grams.

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This study aimed to investigate the bacterial contamination of flake and cube ice being used daily in the community. Thirty-one ice samples were collected from different areas in the city of Can Tho, Vietnam. The enumeration of total aerobic mesophilic counts, presence of coliforms and Escherichia coli (E. coli) and determination of antibiotics resistance of E. coli isolates were examined. The results indicated that total aerobic mesophilic counts ranged from 2.5 to 6.2 log CFU/mL and there was significant difference between the total aerobic mesophilic counts found in flake and cube ice (p < 0.05). Coliforms and E. coli present on the flake and cube ice samples were 93.55 % and 58.06 %, respectively. A total of 39 E. coli isolates were tested against fifteen antibiotics, 74.36 % of which were multi-drug resistant to three to thirteen antibiotics. High prevalence of resistance was to Ampicillin (79.49 %), Cefotaxime (69.23 %), Ceftazidime (46.15 %), Tetracycline (56.41 %), Sulfamethoxazole/Trimethoprim (46.15 %), Colistin (20.51 %), etc. As E. coli is a hygiene indicator and a candidate vehicle for the transfer of antibiotic resistance gene, it is highly recommended using clean and potable water in ice making as well as preventing the spread of antibiotic resistant bacteria.

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Foreword xi This book **is** the result **of** a lifetime exploring the world **of** LEGO. As a kid, I loved taking mechanical things apart to figure out how they worked, then either putting them back together or using the parts to invent something new, so I really enjoyed playing with LEGOs—despite the fact that the things I built often fell apart! Eventually, though, I grew out **of** them. Several years after I grew out **of** this first LEGO phase, LEGO introduced the TECHNIC line **of** LEGOs, a superior set **of** building parts allowing sturdy structures and compli- cated designs with gears, levers, and all kinds **of** moving mechanics, and then introduced the MINDSTORMS line. Two and a half years ago, my wife got me the LEGO MINDSTORMS Dark **Side** Developer Kit for Christmas—I immedi- ately built the AT-AT walker and was hooked on LEGOs all over again. A few months later, I went out and got the Robot Invention System 1.5, and thus began my second LEGO phase. LEGO’s TECHNIC and MINDSTORMS kits have allowed me to pursue both my passion for building with LEGOs and my interest **in** all things mechanical.

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determine altitude (a), draw a vertical line segment connecting point A to BC, which creates a 45°-45°-90° triangle. The ratio **of** the triangle’s hypotenuse to each leg **is** = 2:1. The hypotenuse AB 5 2. Thus, the altitude (a) **of** ABCD **is** 2 = 2 , or = 2. Accordingly, the area **of**

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Then, f ( x ) = 0 has a solution **in** Ω . For n = 1, Theorem 1.1 reduces to the well-known intermediate-value theorem. Mi- randa proved his theorem using the Brouwer fixed point theorem. Using the Brouwer degree **of** a mapping, Vrahatis gave another short proof **of** Theorem 1.1 (see [ 2 ]). Follow- ing this proof it **is** easy to see that Theorem 1.1 **is** also true, if L **is** dependent **of** i ; that **is**, Ω can also be a rectangle and need not to be a **cube**. Even some L i can be zero. Very often, the theorem **of** Miranda **is** stated as **in** the following corollary (see also [ 3 , 4 ]), which **is** not the theorem **of** Miranda **in** its original form, but a consequence **of** it.

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You are now ready to complete the Aggregation Design Wizard. The final step **is** to either process this aggregation or save your results and process it later. You should choose to process this aggregation now and then click Finish (see Figure 51.45). The Process Progress dialog appears immediately, and you get to watch the full extent **of** the **cube**’s aggregation partitions being built (that **is**, populated). Aggregation SQL queries are actually created under the covers to populate all these aggregation levels (which are implementing your design levels). It’s nice to have Microsoft dynamically create these complex queries for this critical performance optimization step so you don’t have to worry about it yourself.

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outdoors such as “Go down to the big tree and turn left.” Inherent **in** such a paradigm **is** the robot being able to recognize a “big tree” and do it **in** unstructured environments without too many pre-mapped fixed landmarks. Ultimately we envision mobile robots that unobtrusively mix **in** with pedestrian traffic and hence traveling primarily at a walking pace. With regard to sensors this **is** a different problem from robots designed to drive on roadways, since the necessary range **of** sensors **is** tied to the speed **of** the robot. It’s also important to note that small mobile robots that are intended to mix with pedestrian traffic must normally travel at the same speed as the pedestrians, even if they occasionally scurry quickly down a deserted alley or slow way down to traverse a tricky obstacle, because people resent having to go around a slow robot while they are also easily startled by machines such as Segways that overtake them without warning. At walking speeds the range **of** sonar at about 50kHz **is** optimal, and there are none **of** the safety concerns one might have with lidar, for example. This type **of** sonar **is** precisely what bats use for echolocation; the goal **of** our research **is** to employ sonar sensors to allow mobile robots to recognize objects **in** the everyday environment based on simple signal processing algorithms tied to the physics **of** how the sonar backscatters from various objects. Our primary interest **is** for those sensors that can function well outdoors without regard to lighting conditions or even **in** the absence **of** daylight. We have built several 3D sonar scanning systems packaged as sensor heads on mobile robots, so that we are able to traverse the local environment and easily acquire 3D sonar scans **of** typical objects and structures. **Of** course sonar **of** the type we’re exploring **is** not new. As early as 1773 it was observed that bats could fly freely **in** a dark room and pointed out that hearing was an important component **of** bats’ orientation and obstacle avoidance capabilities (Au, 1993). By 1912 it was suggested that bats use sounds inaudible to humans to detect objects (Maxim, 1912) but it wasn’t until 1938 that Griffin proved that bats use ultrasound to detect objects (Griffin, 1958).

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- Shadow of Chernobyl * Sauerbraten/Cube 2 engine * Serious Sam 2 * Silent Hunter 4 * Silkroad Online Test trên nền x86 và x64 * Sim City 4 Deluxe Edition Test trên nền x86 * Sins of a S[r]

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Reverse Current Gain : You may be convinced that you will never operate a transistor with the collector and emitter interchanged, but just **in** case provided the parameters BR, NR, VAR, IKR and TR . Base-Collector Diode : Here again we have the basic diode Spice parameters, again renamed: ISC (**IS**), NC (N), RC (RS), XTF (XTI), CJC (CJO), VJC (VJ), MJC (M) and TF (TT). The last one **is** the transit time (now through the base to the collector) which accounts for any delay which cannot represented by capacitance alone; it **is** embellished by ITF (which makes TF dependent on current), VTF (showing dependence **of** TF on base- collector voltage) and PTF (an excess phase at a frequency 1/(TFx2p)).

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Copyright © 2007 Andrey Norkin et al. This **is** an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction **in** any medium, provided the original work **is** properly cited. 1. INTRODUCTION Nowadays, video **is** more often being encoded **in** mobile devices and transmitted over less reliable wireless chan- nels. Traditionally, the objective **in** video coding has been to achieve high compression, which was attained with the cost **of** increasing encoding complexity. However, portable devices, such as camera phones, still lack enough computa- tional power and are energy-consumption constrained. Be- sides, a highly compressed video sequence **is** more vulnera- ble to transmission errors, which are often present **in** wireless networks due to multipath fading, shadowing, and environ- mental noise. Thus, there **is** a need **of** a low-complexity video coder with acceptable compression eﬃciency and strong error-resilience capabilities.

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A Circular Navigation System Although this chapter **is** called Motion , you can do more with the skills you’re accumulating than move objects around the stage. You can use the same math that animates an object along a circular path to position static elements along a circle. The following script, found **in** the circle_navigation.fla source file, automatically positions six buttons around a center draggable object, as shown **in** Figure 7-16. The buttons, complete with labels, are children **of** the center object. So, when the center object **is** dragged around, all the buttons follow making a movable navigation system. Such a system could be very useful for projects with large visual assets, or many user interface elements, because the navigation widget could be moved around as needed to expose underlying content.

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[r]

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LỜI MỞ ĐẦUHiện nay các vi xử lí, hay điều khiển đang được sử dụng rộng rãi trong nhiều lĩnh vực: điều khiển, tự động hóa, đo đạc, truyền thông,…so với các phương pháp điều khiển đo đạc, truyền thống thì việc sử dụng vi xử lí có những ưu điểm như: nhỏ gọn, ít tốn năng lượng, thời gian đáp ứng nhanh có thể lập trình được…Ý thức được tầm quan trọng của Lập Trình Nhúng trong ứng dụng cho lập trình vi điều khiển là cơ sở để chúng em chọn đề tài Lập Trình Nhúng “ Đèn Led dạng khối lập phương 3x3x3”.Với sự hướng dẫn tận tình của thầy TS.Nguyễn Thanh Bình mà chúng em hoàn thành đề tài này. Mặc dù vậy, do trình độ còn hạn chế và thời gian có hạn nên chúng em chắc chắn rằng đề tài này không thể tránh khỏi những thiếu sót. Chúng em rất mong nhận được sự thông cảm và góp ý của quý thầy cô trong khoa.Chúng em xin chân thành cảm ơn.MỤC LỤCCHƯƠNG 1: GIỚI THIỆU81.1 Giới thiệu đề tài81.2 Nội dung đề tài81.3 Giới hạn đề tài81.4 Cấu trúc báo cáo8CHƯƠNG 2: CƠ SỞ LÝ THUYẾT92.1 Lý thuyết lập trình nhúng92.1.1 Lập trình nhúng là gì?92.1.2 Lịch sử92.1.3 Đặc điểm102.1.4 Giao diện112.1.5 Thiết bị ngoại vi122.1.6 Công cụ phát triển122.1.7 Độ tin cậy132.2 Các kiến trúc phần mềm hệ thống nhúng132.2.1 Vòng lặp kiểm soát đơn giản132.2.2 Hệ thống ngắt điều khiển132.3 Tìm hiểu về Mega 2560152.3.1 Arduino Mega 2560172.3.2 Thông số kĩ thuật192.3.3 Chi tiết sản phẩm202.3.4 Ứng dụng thực tế212.4 Công cụ ngôn ngữ thực hiện22CHƯƠNG 3: XÂY DỰNG ỨNG DỤNG233.1 Mô tả bài toán233.1.1 Diễn tả mạch233.1.2 Chức năng của mạch233.1.3 Ý nghĩa233.2 Yêu cầu bài toán233.2.1 Thiết kế mạch cần gì?233.2.2 Ứng dụng như thế nào?23CHƯƠNG 4: HIỆN THỰC ỨNG DỤNG244.1 Đoạn code nhấp nháy đèn24CHƯƠNG 5: KẾT LUẬN275.1 Các công việc đã thực hiện275.2 Ưu điểm, nhược điểm275.3 Hướng mở rộng tương lai27 CHƯƠNG 1: GIỚI THIỆU1.1 Giới thiệu đề tàiCác biển quảng cáo led , hay các màn hình LED 2D, LED MATRIX được nhìn thấy ở khắp mọi nơi, nó sử dụng để hiển thị các hình ảnh, chữ cái …..Chúng phục vụ vào các mục đích khác nhau chẳng hạn như quảng cáo, trang trí nhà hàng, quán cafe, hay là hiển thị những thông tin, hình ảnh ở các siêu thị, công ty. Tuy nhiên các hình ảnh, hiệu ứng hiển thị vẫn còn hạn chế, thiếu trực quan và ít hấp dẫn.Để giái quyết vấn đề đó giải pháp là khối LED 3D CUBE có khả năng hiển thị chữ, hình ảnh theo dạng 2 và 3 chiều sinh động khác biệt và ưu thế hơn so với LED 2D thông thường, chúng tạo ra hình ảnh trong không gian 3 chiều hiển thị các hiệu ứng từ đơn giản đến phức tạp với nhiều kiểu phong phú, đẹp mắt….. không bị gò bó và giới hạn bởi không gian phẳng, mang lại tính trực quan hơn.

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Then, f ( x ) = 0 has a solution **in** Ω . For n = 1, Theorem 1.1 reduces to the well-known intermediate-value theorem. Mi- randa proved his theorem using the Brouwer fixed point theorem. Using the Brouwer degree **of** a mapping, Vrahatis gave another short proof **of** Theorem 1.1 (see [ 2 ]). Follow- ing this proof it **is** easy to see that Theorem 1.1 **is** also true, if L **is** dependent **of** i ; that **is**, Ω can also be a rectangle and need not to be a **cube**. Even some L i can be zero. Very often, the theorem **of** Miranda **is** stated as **in** the following corollary (see also [ 3 , 4 ]), which **is** not the theorem **of** Miranda **in** its original form, but a consequence **of** it.

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13. The correct answer **is** (D). 14. The correct answer **is** (B). The converse, inverse, and negative are not equivalent statements. The contrapositive, ~ Q → ~ P , **is** equivalent and this **is** the same as saying that Q **is** a necessary condition for P . 15. The correct answer **is** (C).

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The shortest path on the surface of a cube from vertex A to the furthest vertex B involves crossing a certain number of faces and edges of the cubeA. See the diagramB[r]

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Many data stream sources (for example, web site access patterns, transac- tions **in** financial markets, and communication network traffic) are prone to dramatic spikes **in** volume (e.g., spikes **in** traffic at a corporate web following the announcement **of** a new product or the spikes **in** traffic experienced by news web sites and telephone networks on September 1 1,2001). Because peak load during a spike can be orders **of** magnitude higher than typical loads, fully pro- visioning a data stream monitoring system to handle the peak load **is** generally impractical. However, **in** many monitoring scenarios, it **is** precisely during bursts **of** high load that the function performed by the monitoring application **is** most critical. Therefore, it **is** particularly important for systems processing continuous monitoring queries over data streams to be able to automatically adapt to unanticipated spikes **in** input data rates that exceed the capacity **of** the system. An overloaded system will be unable to process all **of** its input data and keep up with the rate **of** data arrival, so loadshedding, i.e., discarding some fraction **of** the unprocessed data, becomes necessary **in** order for the system to continue to provide up-to-date query responses. **In** this chapter, we consider the question **of** how best to perform load shedding: How many tuples should be dropped, and where **in** the query plan should they be dropped, so that the system **is** able to keep up with the rate **of** data arrival, while minimizing the degree **of** inaccuracy **in** the query answers introduced as a result **of** load shedding?

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3.3.2-1. Basic notions and properties. A figure formed by three great circle arcs pairwise connecting three arbitrary points on the **sphere** **is** called a spherical triangle (Fig. 3.37a). The vertices **of** a spherical triangle are the points **of** intersection **of** three rays issuing from the center **of** the **sphere** with the **sphere**. The angles less than π between the rays are called the sides a , b , and c **of** a spherical

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with 2.5.2 Pipelining Pipelining **is** a means to achieve speedup for an algorithm by dividing the algorithm into stages. Each stage **is** to be executed **in** the same amount **of** time. The flow **is** divided into k distinct stages. The output **of** the j th stage becomes the input to the ( j + 1) th stage. Pipelining **is**

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ptg An Analytics Design Methodology A data warehouse can be built from the top down or from the bottom up. To build a top- down warehouse, you need to form a complete picture or logical data model for the entire organization (or all the subsystems within the scope **of** the project, such as all financial systems). **In** contrast, building a warehouse from the bottom up takes a much more departmental or specific business-area focus (for example, a sales order system only). This breaks the task **of** modeling the data into more manageable chunks. Such a departmental approach produces data marts that are potentially subsets **of** the overall data warehouse. The bottom-up approach can simplify implementation. It helps get departmental or busi- ness-area information to the people who need it, makes it easier to protect sensitive data, and results **in** better query response times because data marts deal with less data than a voluminous transactional system. The potential risk **in** the data mart approach **is** that disparity **in** data mart implementation can result **in** a logically disjointed enterprise data warehouse if efforts aren’t carefully coordinated across the organization.

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We finally make some convention. Throughout the paper, we always denote by C a positive constant which **is** independent **of** the main parameters, but it may vary from line to line. Constant with subscript such as C 1 does not change **in** di ﬀ erent occurrences. The notation Y Z means that there exists a constant C > 0 such that Y ≤ CZ , while Y Z

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Graph: biểu đồ Combine: kết hợp Expression= statement phát biểu, biểu thức Total : tổng số Solid: khối hình Figure: hình dáng Cube: hình lập phương Cone: hình nón. Sphere: hình c[r]

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Select axis **of** revolution : chän trôc quay Start angle <0> : vÞ trÝ b¾t ®Çu trôc xoay Included angle ( +=CCW,-=CW) < fullcircle> : gãc xoay • Chó ý : nÕu trôc xoay kh«ng ph¶i lµ ®−êng line hoÆc pline xuÊt hiÖn dßng nh¾c : Entity not usable as rotation axis : ®èi t−îng kh«ng thÝch hîp lµm trôc xoaỵ 3.LÖnh rulesurf : mÆt kÎ

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16. b. The area **of** a circle **is** equal to π r 2 . The **radius** **of** the inner circle **is** 5 m; therefore, the area **of** the inner circle **is** 25 π m 2 . The **radius** **of** the outer circle **is** (1.2)(5) = 6 m; therefore, the area **of** the outer circle **is** 36 π . Subtract the area **of** the inner circle from the area **of** the outer circle: 36 π – 25 π = 9 π m 2 .

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B. Pythagorean triples These are sets **of** numbers that satisfy the Pythagorean Theorem. When a given set **of** numbers such as 3, 4, 5 forms a Pythagorean triple (3 2 + 4 2 = 5 2 ), any multiples **of** this set such as 6, 8, 10 or 30, 40, 50 also form a Pythagorean triple. Memorizing the sets **of** Pythagorean triples that follow will save you valuable time **in** solving problems, for, if you recognize given numbers as multiples **of** Pythagorean triples, you do not have to do any arithmetic at all. The most common Pythagorean triples that should be memorized are

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aR n 0 , aR n − 1 0 , . . . , a 1 0 , and then ending with the edge to a 1 1. This **is** pictured for R = 4 **in** Figure 5. Regardless **of** whether R **is** even or odd, the construction gives a cyclic ( n + 1)-digit R -ary Gray code (provided the number **of** partition-blocks **is** even when R **is** odd). **In** what follows this will be referred to as the code induced by the partition B 1 ∪ . . . BL . By arranging the vertices **of** the (binary) n -**cube** **in** a grid whose rows are indexed by an ( n − 2)-**cube** and its columns by 00 10 11 01, most known n -digit binary codes can be seen to have this kind **of** partitioning behavior. When viewed from this perspective **of** partitions, the combinatorial argument for the binary constructions **in** [2, 7] required some restrictions on the usable partitions; for instance, at least two blocks can have only one element.

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Find the smallest two-digit number such that its cube ends with the digits of the original number in reverse order.. A Mathematics test consists of 3 problems, each problem being graded[r]

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5.4 Specimen Molds—Molds for the 40 by 40 by 160-mm prism specimens shall be triple-gang molds and shall be so designed that the specimens will be molded with their longi- tudinal axes **in** a horizontal position. The molds shall be made **of** a hard metal, not attacked by cement mortar, and with a Rockwell hardness **of** not less than HRB 55. The parts **of** the molds shall be matchmarked and, when assembled, shall be tight-fitting and positively held together. The sides **of** the molds shall be sufficiently rigid to prevent spreading or warping. The interior faces **of** the molds shall be plane surfaces with a permissible variation, **in** any 50-mm line on a surface, **of** 0.03 mm for new molds and 0.05 mm for molds **in** use. The distance between opposite sides shall be 40 6 0.13 mm for new molds and 40 6 0.3 mm for molds **in** use. The height **of** the molds shall be 40 mm with permissible variations **of** +0.25 and −0.15 mm for new molds, and +0.25 and −0.40 mm for molds **in** use. The inside length **of** the molds shall be 160 6 2.5 mm. The angle between adjacent interior faces and top and bottom planes **of** the mold shall be 90 6 0.5°, measured at points

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Standard Test Method for Potential Expansion **of** Portland-Cement Mortars Exposed to Sulfate 1 This standard **is** issued under the fixed designation C 452; the number immediately following the designation indicates the year **of** original adoption or, **in** the case **of** revision, the year **of** last revision. A number **in** parentheses indicates the year **of** last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

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a) lower part: extruded to a height **of** 50 with 15 taper b) middle part: extruded to a height **of** 60 with 0 taper c) top part: revolved about a line object for 90 degrees and then polar arrayed for 3 items about the top ‘circle’ centre. The line for the object can be drawn at your discretion. The line I used was drawn between two endpoints **of** a cut out on the top surface **of** the second extrusion as indicated **in** the activity drawing.

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Specify rotation angle **of** wedge about the Z axis: góc quay chung quanh tr ụ c song song v ớ i tr ụ c z vă tr ụ c năy đ i qua đ i ể m Corner **of** wedge Ví d ụ : Command: 3D↵ Enter an option[Box/Cone/DIsh/DOme/Mesh/Pyramid/ **Sphere**/Torus/Wedge]: w↵ Specify corner point **of** wedge: ch ỉ m ộ t đ i ể m trín măn hình

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