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phuong2k2002
2 năm trước
Mạch 1 của gen có 1199 liên kết hoá trị, có T1 = 420 và X1 = 30% số Nu của mạch. Gen có số liên kết hiđrô giữa A và T bằng số liên kết hiđrô giữa G và X. Quá trình phiên mã cần môi trường cung cấp 900 rNu loại A. Tỉ lệ % từng loại Nu A, T, G, X trong mạch khuôn là: A. 25%, 35%, 30%, 10% B. 30%, 25%, 10%, 30% C. 35%, 25%, 30%, 10% D. 10%, 30%, 25%, 35%
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GIÚP MÌNH VỚI Reading comprehention A. Nam is from the Mekong Delta in Vietnam and his daily routine is the same as many other children who live the country. His (1)__________ begins very early. He helps his parents do(2) _________. Every morning he ___________(3) at 5.30 a.m. he helps his dad water the vegetables, and then he has to ___________(4)the chickens on the farm. At 6.15 a.m, Nam has to walk to school. In the afternoon, Nam helps his mom ___________(5) after his brother. After dinner, Nam ___________(6) wash the dishes and gets ready for bed. Nam has to do many activities everyday like most children in the Mekong Delta. 1. A. routine B. day C. chore D. 2. A. the homework B. the laundry C. chores D. chore 3. A. wakes at B. wakes up C. wakes on D. wake of 4. A. fit B. feet C. feed D. eat 5. A. look B. take C. have D. do 6. A. have B. have to C. has to D. has TRUE or FALSE 1. Nam lives in the Mekong Delta. 2. He has to wake up at 6.15 a.m 3. He helps his dad with the farm work. 4. Nam helps his mom look after his brother every night. B. Fred: Hey, Mary! Festival Week is start next week. Would you like to come? Here’s the timetable. Mary: wow, that sounds interesting. Oh look! Why don’t we go to the quiz show ? Fred: oh, sorry, I can’t. I have a pottery class on Monday. What about the art exhibition on Tuesday? Mary: I’m sorry, I can’t. I need to study for the exam in the afternoon. What about the pottery exhibition on Wednesday? Fred: I’m not free on Wednesday. I think the dance competition wil be exciting. It’s on Thursday. And why don’t we go to the extreme sport competition on Friday? Mary: I’m free on Friday, so I can go. I want to go to the carnival, too. Fred: sure, sounds good. I’m free on Saturday, too. It’ll be fun, won’t it? See you on Friday. Mary: Yes, it will. See you soon. TRUE or FALSE 1. Mary suggests going to the quiz show. 2. Mary want to go to the art exhibition 2. Fred is busy on Wednesday 4. Mary and Fred will go to the extreme sport competition and the carnival. C. Sarawut is a 13-year-old from a small town in Thailand. Every day, he has to wake at 5.30 a.m to do some chores. In the morning, he feeds the chickens and ducks and collects their eggs. After that, he goes to school by bicycle. He helps his mother look after his sister in the afternoon. He also cleans the house and does his homework. After dinner, he washes the dishes. Finally, he takes a shower and goes to bed at 9 p.m. On the weekends, he usually helps his parents on the farm. Sarawut has a lot of things to do everyday. 1. Sarawut is from Thailand 2. His work begins at half past five. 3. He walks to school 4. He helps his parents do some chores everyday

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