present perfect continuous tense use of since and for

... Magnusson offers an informed (11) _of Oxford's past and present Special materials for children and foreign (12) _commentaries are also available A place B date C manner D form A Vary ... year / for hours / for months/ for years Thì thường không dùng với ever never ■ Sự khác hai thì: Present perfect nhấn mạnh kết hành động (the result of the action / event) Present perfect continuous ... abroad look for students who are independent, self-assured, enjoy new experiences and different types of people, and can handle challenges If you really hate change and don't like the idea of figuring

Ngày tải lên: 31/12/2021, 22:22

... Present Perfect (Thì Hiện tại hoàn thành) and Present Perfect Continuous (Thì Hiện tại hoàn thành tiếp diễn) Present Perfect Công thức: Subject + have/has ... mọi việc tôi sẽ goi cho bạn  Lưu ý: hành động ở trong tương lai nhưng dùng thì Present perfect. Present Perfect Continuous Công thức: Subject + have/has + been + V-ing Trong đó:  Have: dùng ... Your eyes are red. Have you been crying for long time? Mắt của em đỏ. Có phải em đã khóc rất lâu không? Các từ hay đi cùng với Present Perfect  Since / for  Already / Not yet  Ever / never  Now

Ngày tải lên: 02/03/2014, 15:18

... and attractive for the predators Table 4.4.3 Artificial seawater formulations used for tank production of Artemia (ing.l-1) For the Dietrich and Kalle formulation, solutions A and B are prepared ... juveniles and adults are used as a nursery diet not only for their optimal nutritional value but also for energetic advantages as well For example, when offered large Artemia instead of freshly-hatched ... industrial level because of the limited availability of live or frozen biomass, its high cost and variable quality Technologies developed in the eighties for establishing intensive pond and super-intensive

Ngày tải lên: 15/12/2013, 00:15

... 160 µm for larger rotifers, nauplius and copepodite stages of copepods; · 300 and 500 µm for small water fleas and smaller species of cyclopoid copepods; · 700 µm for adult water fleas of the ... live weight of Tigriopus can be harvested during 89 days at maximal densities of 22,000 animals.l-1; the amount of yeast used for a kg production of Tigriopus being to kg 5.2.6 Use of resting ... technology and therefore have a high investment and energy cost Since the intensive hatchery has to produce sufficient amounts of live food and keep the cultures on during periods of low demand, high

Ngày tải lên: 15/12/2013, 00:15

... Daphnia and Moina 6.1.1 Biology and life cycle of Daphnia 6.1.2 Nutritional value of Daphnia 6.1.3 Feeding and nutrition of Daphnia 6.1.4 Mass culture of Daphnia 6.1.5 Production and use of resting ... structures that serve for suspension feeding (filter feeders) and for locomotion The anterior part of the trunk, the postabdomen is turned ventrally and forward and bears special claws and spines to ... Production and use of resting eggs Resting eggs are interesting material for storage, shipment and starting of new Daphnia cultures The production of resting eggs can be initiated by exposing a part of

Ngày tải lên: 15/12/2013, 00:15

... TREES OF THE NORTHERN UNITED STATES THEIR STUDY, DESCRIPTION AND DETERMINATION FOR THE USE OF SCHOOLS AND PRIVATE STUDENTS BY AUSTIN C APGAR PROFESSOR OF BOTANY IN THE NEW JERSEY ... NEEDED FOR THEIR DESCRIPTION Chapter I Roots Though but little study of the roots of trees is practicable, some knowledge of their forms, varieties, and parts is important The great office of the ... surface caused by the allowance for growth None of the characteristics of trees afford a better opportunity for careful observation and study than the outer bark The Birches have bark that peels off

Ngày tải lên: 13/02/2014, 12:20

... use of health care and the need for long-term care require an analysis of the current situation in each EU country and a study of the determinants for using both (especially the influence of ... extent and structure of the demand for health care and health expenditures The spectrum of diseases of the elderly is different from that of the younger population and ... supply of informal family care-giving and may increase the demand for professional home care and institutional care. In all EU countries family structures are changing: the proportion of elderly

Ngày tải lên: 05/03/2014, 18:20

... years ago, and the elephant-like mastodons and the sloth of North America about 13,000 years ago The story was similar for large island birds such as the moas of New Zealand, exterminated ... assessment of fishery impact in the North Atlantic Ocean and recommendations for mitigating that impact It serves as a model of tested methodologies for analyzing and assessing ... buried,” where the terrestrial landscape is everywhere being cut-up and paved over as a consequence of human population pressure and increasing demand from each of us, we have the opportunity

Ngày tải lên: 06/03/2014, 18:21

... selectively Fig. 1. Effects of insulin and wortmannin on GSK3 a and b activity in L6 myotubes and relative abundance of GSK3 isoforms in L6 and 3T3-L1- adipocytes. (A) L6 myotubes were pretreated for 10 min with ... myoblasts and myotubes with antibodies against GSK3a and b. Fig. 1B shows that whilst preadipocytes express both GSK3 isoforms, the abundance of the b isoform declines by  85%, whereas that of the ... regulation of GSK3 and GS To further understand the effects of Li and SB-415286 on cell signalling events we assessed their effects and that of insulin on p70S6K, PKB, p42/p44 MAP kinases, GSK3 and GS.

Ngày tải lên: 08/03/2014, 08:20

... www.epa.gov/climateleaders Of? ??ce of Air and Radiation CLIMATE LEADERS GREENHOUSE GAS INVENTORY PROTOCOL CORE MODULE GUIDANCE Direct HFC and PFC Emissions from Use of Refrigeration and Air Conditioning ... type, and the charge capacity of each piece of equipment where: CD = charge capacity of the piece of equip­ ment being disposed of y = percent of the capacity remaining at disposal z = percent of ... information: ■ Type of Equipment ■ Number of Units ■ Refrigerant Used ■ Total Refrigerant Charge for the Equipment (lb.) For refrigeration and air conditioning equip­ ment, the additional information

Ngày tải lên: 08/03/2014, 19:20

... us to use similar Adolescents’ Use of Maternal and Child Health Services TABLE Year of Demographic and Health Survey used to study women’s use of maternal and child health services, number of years ... particularly for diphtheria, pertussis and tetanus and for measles (0.5–0.8) The association of age and health care use was largely limited to Bangladesh, India, Indonesia, Nicaragua, Peru and Uganda ... after 1992, because recent data are more relevant to making policy and programmatic recommendations, and because 1992 demarcates the end of DHS-II surveys and the beginning of DHS-III and DHS+ surveys,

Ngày tải lên: 14/03/2014, 11:20

... analytical framework which consists of five capital assets (human, financial, physical, social and natural) and can be used for various livelihoods options. Use of algae and aquatic macrophytes as feed ... edited for technical content by Michael B. New. For consistency and conformity, scientific and English common names of fish species were used from FishBase (www.fishbase.org/home.htm). Most of ... the production and/ or cultivation techniques and use of the macrophytes in their fresh and/ or processed state as feed for farmed fish. Efficiency of feeding is evaluated by presenting data

Ngày tải lên: 14/03/2014, 11:21

... for broiler and 64% for layer; and 43% for sow, 77% for piglet and 45% for porker production. The remainder used both complete and mixed feed in the daily diet for livestock. The ratio of ... Vietnam For Information of the Minister of Agriculture, and relevant Departments of the Ministry of Agriculture and Rural Development and Provincial Departments of Agriculture and Rural ... in Vietnam For Information of the Minister of Agriculture, and relevant staff of the Ministry of Agriculture and Rural Development and provincial Departments of Agriculture and Rural Development,

Ngày tải lên: 21/06/2014, 05:20

... 10.1155/ASP/2006/87298 Use of Genetic Algorithms for Contrast and Entropy Optimization in ISAR Autofocusing Marco Martorella, Fabrizio Berizzi, and Silvia Bruscoli Department of Information Engineering, ... [1–4]. The exploitation of large band- width signals and the coherent integration of the echoes pro- vide the basis for the ISAR image formation. Before the ac- tual image formation, the signal ... number of iterations (MNI) and the tolerance value (TV). The explanation of the former is straightforw ard and it concerns the stop condition for the iterative algorithm, whereas the second represents

Ngày tải lên: 22/06/2014, 23:20

... could use INSTR again to search for a space, and use the location of the space in the string, plus one (+1), as the starting point for SUBSTR. No ending point is required for SUBSTR, because you ... Variables used in SQLPLUS commands, however, are still substituted as before As of Oracle9i, set scan on/off is deprecated use set define in place of set scan See the set command in the ... BOOKSHELF_CHECKOUT order by DaysOut desc; NAME -ROLAND BRANDT ROLAND BRANDT ROLAND BRANDT GERHARDT KENTGEN PAT LAVAY FRED FULLER... Color profile: Generic CMYK printer profile Composite Default screen Series

Ngày tải lên: 07/08/2014, 14:20

... (P-value) of LOH and ASE Binomial function was used for both LOH and ASE significance to calculate the probability of the reads being randomly distributed... mediators and clinical ... H, Boland CR, Koi M: Genetic instability caused by loss... 16°C for 2 h after addition of 10 units of Escherichia coli DNA ligase, 40 units of E coli DNA polymerase, and 2 units of RNase ... added and incubated for 5 minutes at 16°C Double-strand cDNA was purified by phenol-chloroform extraction and precipitation of the aqueous phase in 1/10 volume 3 M sodium acetate and

Ngày tải lên: 09/08/2014, 22:23

... retroviral vec- tors, principally because viral titres were low, because of high rates of repair of the SIN deletion [13,89] and because of negative effects of the SIN deletion on gene transfer ... number of non-defective retroviruses that are oncogenic. These generally induce cancers after longer latency periods. HTLV and BLV and related viruses form a separate class of complex retroviruses ... simplicity of the retroviruses, there appears to be much still to learn about many aspects of HIV-1. There are also a number of viruses that cause central nervous system (CNS) pathology. For some of

Ngày tải lên: 14/08/2014, 19:22

... languages, through its rich and flexible type system, its sparse and clean syntax, and its marriage of functional and object paradigms.” - Charles Nutter, creator of JRuby “I can honestly say ... can be achieved by unifying and generalizing functional and object-oriented programming concepts 13 Why unify FP and OOP?... method of of sequences with map and mkString methods applies ... some of the more arcane constructs of these environments and adds instead: (1) a uniform object model, (2) pattern matching and higherorder functions, (3) novel ways to abstract and

Ngày tải lên: 24/10/2014, 13:47

... using them Evaluation can be pre -use and therefore focused on predictions of potential value It can be whilst -use is therefore focused on awareness and description of what the learners are actually ... materials are being used And it can also be post -use and therefore focused on analysis of what happened as a result of using the materials 2.1.3.2 Criteria for textbooks Four criteria for evaluating ... appropriateness and relevance of the teaching materials refer to whether the topics and themes in the materials are of learners’ interest and of their experiences and lives Some materials will present

Ngày tải lên: 25/11/2014, 00:35

... Tips and Tick for Left Main PCI Integrated Use of FFR and IVUS Seung-Jung Park, MD, PhD Professor of Medicine, University of Ulsan College of Medicine Heart Institute, ... vessel diameter (myocardium) FFR Is Anatomical and influenced • Many lesion specific local factors Functional Integration of Stenosis the value of FFR “Total Lesion Perception” Park SJ et

Ngày tải lên: 15/11/2016, 03:03