cách giải bài cho phân số 15/39 .Tìm một số tự nhiên,biết rằng khi thêm số đó vào mẫu số đã cho và giữ nguyên tử số thì được một phân số mới bằng 3/11

Cho 3 điện tích q1 = q2 = q3 = 1,6.10^ -19 C đặt trong không khí tại ba đỉnh A, B, C của tam giác đều cạnh a = 5 cm. Tính lực tác dụng lên mỗi điện tích.

gấp !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Exercise 4: Choose the best answer to complete the sentences. 1. They detest ________ so early in the morning. A. getting up B. to get up C. get up D. gets up 2. They enjoy ________ on Sundays. A. garden B. gardens C. gardening D. gardened 3. Does she fancy ________ a book to the younger children? A. read B. reads C. reading D. to read 4. My dad doesn't mind ________ my mom from work every day. A. picking up B. picks up C. pick up D. picked up 5. They love ________ with their friends. A. having eaten B. eat out C. ate out D. to eat out 6. I prefer ________ people. A. texting B. texted C. texts D. text Exercise 5: Complete the sentences with the verb + -ing. do go play ski swim watch 1. Susan loves ________________ judo. 2. They enjoy _________________ the Olympics on TV. 3. We really like _________________ in the Alps in February. 4. Sam hates _________________ boxing but he loves football. 5. I don’t like ___________________ in the pool at the sports centre. 6. Do you like ________________ running in the morning?

Vẽ những hình ảnh mà em thích nhất trong ngôi trường (trường cấp hai)

a, F = {100;101;102;…;999}; b, E ={1;2;3;4;5;6;7;}.

Giúp mình với mình đang cần gấp

Exercise 3: Put the correct form of the verbs in brackets 1. The boys love ( play ) __________ soccer after school . 2. The doctor advised Mr Ha ( not do ) __________ any work hard . 3. My grandmother used ( tell ) __________ us stories in the evening. 4. Revision is necessary in (learn ) __________ words . 5. I’ll try ( improve ) __________ my Math next semester . 6. The girls enjoy ( practise) __________ fitness exercises after school 7. His father asked him (drive) __________carefully . 8. Tom used (learn)__________Math badly but now he is good at it . 9. We are interested in ( clean)__________up beaches . 10. We finish (collect) __________broken glasses at six thirty 11. Would you like (listen) __________to some music? 12. Nam enjoys ( play) __________soccer after school. 13. Lan asked me (go) __________to the supermarket. 14.I think you should (do) __________the morning exercise. 15.They used (go) __________to work by train. 16. Don’t let children (play) __________alone. 17.You ought to (do)__________the homework yourself. 18.Mr Hung asked me (tell) __________him the truth. 19.They asked their children ( stay) __________at home. 20.I’d like (buy) __________some new clothes.

Mọi ng ơi làm giúp em Wold foms dc ko ạ. Em đang cần gấp, em sẽ vote 5 sao và ctlhn

mọi người giúp mình với ạ 1. Helen knew her fear was * 1 điểm A. Logical B. Unreasonable C. Based on past experiences D. Quite common 2. Why hadn’t Helen learnt to swim when she was young? * 1 điểm A. She had always been terrified of water. B. She hadn’t had the opportunity. C. She had distrusted her instructor at school. D. The school pool had been too deep. 3. What happened the first time Helen had swimming lessons? * 1 điểm A. She didn’t get over her fears. B. She was afraid of the teachers. C. She managed to swim a reasonable distance. D. She nearly drowned. 4. How did Helen’s family react to her repeated effort to learn to swim? * 1 điểm A. They criticized her. B. They supported her. C. They were patient with her. D. They made fun of her. 5. At the Splash school, the instructors * 1 điểm A. Made her learn at the group’s pace B. Bullied her C. Didn’t rush her D. Explained her fears to her 6. Why did Helen go to a hypnotherapist? * 1 điểm A. She realized she would never be able to swim. B. She suddenly lost her courage. C. She suddenly forgot how to swim. D. She wanted to forget her past fears. 7. Which of these phrases best sums up the article? * 1 điểm A. Fear can be useful. B. Not everyone can do everything. C. You should never give up. D. Everyone is different.