Một gen dài 0,408Mm. Mạch thứ nhất của gen có 40%A gấp đôi số A nằm trên mạch thứ hai a. Tính số liên kết hoá trị giữa đường và axit trong gen giúp mình với ạ

Làm sao để biến đổi từ dòng 1 thành dòng 2 thế ạ?(từ trên xuống)

Qua đoạn 1( từ đầu...rất hiện đại) em hiểu và tiếp thu được gì từ bác

Nêu tác dụng việc kết hợp các nghệ thuật đặc sắc trong văn bản Phong cách Hồ Chí Minh

I. Write the ‘-s/es’ form and ‘-ing’ form of these verbs. break _________ _________ clean _________ _________ come _________ _________ die _________ _________ wash _________ _________ play _________ _________ write _________ _________ start _________ _________ enjoy _________ _________ put _________ _________ go _________ _________ shop _________ _________ shout _________ _________ sit _________ _________ turn _________ _________ open _________ _________ II. Choose the present simple or present continuous. 1. (You / come) _________________________________ tonight? 2. You usually (arrive) _________________________________ late. 3. I (work) _________________________________ at the moment. 4. (He / often / come) _________________________________ to London? 5. He (play) _________________________________ tennis now. 6. (You / go) _________________________________ to the cinema later? 7. They (not / come) ________________________________ to the party tomorrow. 8. He (not / play) _______________________

Tìm x biết: Giúp mình nhanh với ạ,Cần gấp

Exercise 28: Supply the correct form or tense of the verbs in brackets 1. My father (not drink) _____beer very often. 2. They (buy) _____a new car two months ago. 3. Nam (help) _____his farther repair the radio at this time. 4. I (be) _____busy last night, so I (miss) _____a good film on TV. 5. She needs (send) _____the postcard to her friends. 6. The girls like (talk) _____together at recess. 7. We (phone) _____Mum and Dad last week but we (not see) _____them. 8. My best friends (come) _____to visit me next Sunday. Exercise 29: Supply the correct form or tense of the verbs in brackets Yesterday (be) _____ Sunday, Nam (get) _____up at six. He (do) _____morning exercises. He (take) _____a shower, (comb) _____hair, and then he (have) _____breakfast with his parents. Nam (eat) _____a bowl of noodles and (drink) _____a glass of milk for his breakfast. After breakfast, he (help) _____Mom clear the table. After that, he (brush) _____his teeth, (put) _____on clean clothes and (go) to his grandparents ’s house. He (have) _____lunch with his grandparents. He (return) _____ to his house at three o’clock. He (do) _____ his homework. He (eat) _____dinner at 6.30. after dinner, his parents (take) _____him to the movie theater. It (be) _____a very interesting film. They (come) _____back home at 9.30. Nam (go) _____to bed at 10pm.

( 1 : 2 + `2 1/3` + `5/14` ) : `2 1/5`

The headmaster (come) to the school in 1985. giải dùm ạ

(1-1/2)×(1-1/3)×(1-1/4).... (1-1/2020)×(1-1/2021)