... gii Nu d Al thỡ chc chn hn hp kim loi phi cha c kim loi Al, Cu v Fe Do ú Al phi ht sau phn ng v hai kim loi cũn li l Cu v Fe Do Fe nờn chc chn cú phn ng sau xy theo th t: Al FeCl3 AlCl3 FeCl2 ... gim 60%, nờn S chim 40% lng Do ú (2 x )32 0,5 40% x 0,5 H 100% 50% 120 Bi Cho a mol kim loi M (húa tr n khụng i) tan va ht dung dch cha a mol H SO4 ... Li gii Do HCl d nờn ta ch cú cỏc quỏ trỡnh oxi húa kh l: Al Al 3e v H 2e H D dng tớnh c nAl 0, 24 mol Li cú nFe2 0, 25 mol nFe3 151,54 31,75 0, 24.133,5 0,54 mol 162,5 Do lng...
... swum for ages in the beach before that day His mother was angry because he (not / do) had not done / hadn't done her the shopping for Complete the questions in past perfect simple (you / finish) ... they had used to the mathematics exercise When she went out to play, she (do / already) had already done / 'd already done homework She (eat) ate all of the food that we had made her He took off ... friend the play when the lights went off Do the exercises below on the past perfect simple and continuous and click on the button to check your answers (Before doing the exercises you may want to...
... you (do) tonight? How many other students _you (study) _ with today? Where your husband (work) _? What he (do) ... weather (not/get) cold this season My children (not/be) _ upstairs now They (not/play) games at the moment Oh no! The bus (not/come) ... (play) badminton now? _he (watch) _TV now? What _she (do) at 7.00 a.m? Why you (come) _home late? Where ...
... dịch doanh nghiệp với quan nhà nước - B2G (business to government) loại hình giao dịch doanh nghiệp với quan nhà nước, quan nhà nước đóng vai trò khách hàng Quá trình trao đổi thông tin doanh ... sức mạnh vốn có doanh nghiệp khả tận dụng điểm mạnh để vượt qua thách thức bắt đầu kinh doanh mạng Mỗi doanh nghiệp có phương thức riêng biệt để triển khai thương mại điện tử Có doanh nghiệp chủ ... cách bình đẳng với doanh nghiệp nước Các loại hình TMĐT Dựa vào chủ thể thương mại điện tử, phân chia thương mại điện tử loại hình phổ biến sau: • Giao dịch doanh nghiệp với doanh nghiệp - B2B...
... up) _at 6.oo in the morning 27 Ha never(go) _fishing in the winter but she always (do) _.it in the summer 28 My teacher (tell) Hoa about Math 29 There(be) .animals ... .animals in the circus 30. _he (watch) tv at 7.00 ever ymorning? 32 What _she (do ) _at 7.00 A.m? 33 How old _she(be)? 34 How _she (be)? 35 My children (Go) ... ) Tea,but she (not like) coffee 40 I (love) _ catbut I (not love) dog 41 Everyday ,I (go) to school on foot , but today I (go) to school by bike 42...
... _you (do) now? 123. your mother (walk) to work every day? 124.They (not play) soccer in the morning 125. Hai(work) in the garden at the moment? 126.My brother (do) ... in Hanoi but she (not live) in Ha Noi 70.My brother (not live ) in London , he (live ) _ in Manchester 71.Now ,Mr.Long (draw ) his house 72.He (like)...
... mobile → We don't use a computer → Johnny does not swim in the lake → They are from Budapest, Hungary → This isn't my cup of tea → Make negative sentences They go to the supermarket → Ben does his ... short form is given) He doesn't know her → I'm tired → We not understand → I haven't got a sister → She is not there → Choose the correct statement I live in London - What does this sentence mean? ... The referee usually (to stop) The kids (to hurry) to open their presents This car can (to do) 250 km/h the dogs new tricks their litter in the bin the game after 90 minutes Rewrite the sentences...
... (be) ? My children (be) _ upstairs now They (play) games Look! The bus (come) He always (borrow) _me money and never (give) _back 10 While I (do) my housework, my husband ... (watch) TV, my mother (read) the newspaper, my sister (do) her homework and I (play) _chess with my friend 10 She (do) her homework at the time yesterday 11 Marry (water) ... the zoo at ten o’clock yesterday 13 At this time last year we (learn) English in London 14 Peter and I (do) the exercise at this time last night 15 When I phoned my friends, they (play) ...
... nghiệm - Xét m = 1, phương trình (3) có dạng 7x + 16 = ⇔ x = - 16 nghiệm Vậy với m = (P) (P' ) cắt tai điểm - Xét m ≠ (P) (P' ) có không điểm chung ⇔ ∆ ≤ ⇔ (m+6)2 – 64(m – 1) ≤ ⇔ m2 – 52m + 100 ≤ ... trị tương ứng vế f(x0) = g(x0) = y0 + Nên đồ thị hàm số y = f(x) y = g(x) có điểm chung (x0;y0) Dođồ thị y = f(x) y = g(x) mặt phẳng toạ độ số điểm chung chúng số nghiệm phương trình (1) * Cách...