........................................

Bài 3. (T97) Để tổng hợp một phân tử mARN, một gen đã phải đứt 3900 liên kết hidro và cần môi trường nội bào cung cấp 375G, 525X. Gen đó phiên mã không vượt quá 5 lần đã cần 465 A. Gen đó lại tiếp tục phiên mã cho một số phân tử mARN khác đã cần 775 A. a. Tính số lượng từng loại Nu của gen. b. Tính số lượng Nu loại A và U của phân tử mARN được tạo ra từ gen đó.

Ex6 ,Rewrite the sentences using “wh-word + to-infinitive”. 1. I don’t know what I should do. 2. Could you tell me where I can find more information about this? 3. He’s not sure when he should start the computer. 4. They wondered how they could deal with this problem. 5. I can’t decide whether I should answer his letter. 6. Tell me how I can improve my pronunciation of English. 7. He has no idea who he should call for help in case of emergency. 8. He asked his father when he should leave for the bus tomorrow. 9. She wondered how she can tell this news to her parents. 10. My mother couldn’t decide how much money she should spend on Tet holiday.

chứng tỏ rằng a) 2a +111..........1 chia hết cho 3 n chữ số 1 b) 10^n +18^n -1 chia hết cho 27 c)10^n +72^n -1 chia hết cho 81

1. to be/ There/ used/ many/ traffic/ on/ this/ street/ accidents. 2. every/ bus/ My/ takes/ the/ to/ work/ sister/ day. 3. to/ to/ with/ used/ friends/ work/ cycle/ I/ my. 4. traffic/ is/ for/ a/ visitors/ nightmare/ The. 5. I/ to/ up/ in/ study/ used/ morning/ to/ early/ the/ wake. 6. live/ She/ used/ with/ in/ a/ her/ to/ grandparents/ flat/. 7. Tom/ of/ used/ playing/ to/ most/ his/ time/ spend/ games. 8. It’s/ to/ from/ km/ my/ home/ 200/ over/ school. 9. to/ km/ my/ about/ 120/ It’s/ hometown. 10. about/ must/ People/ road/ learn/ safety.

Giúp em với anh ơi em cần gấp lắm anh ưi

Giúp em với ai nhanh hoặc đúng nhất em cho ctlhn ạ

hoà tan hoàn toàn 8,5g hh (na,k) vào nước thu được dd X. trung hoà hết dd X thu được cần dùng 150ml dd H2SO4 1M. Tính % khối lượng mỗi kim loại trong hỗn hợp ban đầu

kể về gia đình em bằng tiến anh

Ex4 Read the passage and answer the questions below. I was born in Hanoi, the capital of Viet Nam. Hanoi is famous for its natural beauty, with lots of rivers and lakes. There are many historical places to visit in Hanoi. The Literature Temple (Van Mieu – Quoc Tu Giam) is the country’s first ever historical university. Teenagers often come here to pray for high results in their upcoming examinations. As Viet Nam is a Buddhism-oriented nation, its capital has also been the centre of Buddhism for centuries. In Hanoi alone, there are about 600 temples and pagodas. It also has a big church in the city centre, a popular place for the few Christians living here. With a population of nearly eight million, the city is quite crowded. However, the public transportation is not adequate, so visitors find it hard to safely cross the roads. The city is packed with universities and enterprises, making it the top destination for higher education students and labour workers. Many people from rural areas reside in Hanoi so that they can get well-paid jobs. This makes the city become more crowded than ever before. 1. What is the passage about? _____________________________________________________________ 2. What does ‘pray for’ means? _____________________________________________________________ 3. What is the most popular religion in Hanoi? 3 _____________________________________________________________ 4. What does ‘adequate’ mean? _____________________________________________________________ 5. What is the city packed with? _____________________________________________________________