Làm hộ mình nha nhanh vote 5 sao vs tim ạ

h2 + o2 =? vậy mọi người cứu tôi

Chứng minh : a) Giao điểm của hai đường chéo của hình chữ nhật là tâm đối xứng của hình chữ nhật đó. b) Hai đường thẳng đi qua trung điểm hai cặp cạnh đối của hình chữ nhật là hai trục đối xứng của hình chữ nhật đó.

1kg = .......g a. 10 g b.100g c.1000g

Everyone suffers from the common cold at some time or other. It isn’t a serious illness, but people spend a lot of money on medicine. The medicine can only relieve the symptoms. That is, it can make you cough less, make you feel better, and stop your nose running for a while. So far, there is no cure for the common cold and no medicine to prevent it. People also drink a lot of hot water with sugar, lemon juice. It helps provide them with a lot of vitamin C. 1Why is the common cold very popular? 2.Is the common cold a serious illness? 3.What does the medicine help people with the common cold? 4.Besides medicine, what do people do to make them feel better? 5.Why is it useful? ____________________________________________________________________________________ IX. Choose the correct answer A, B, c or D to fill each blank in the following passage. My friend, Ben, has had a few problems with his health. He didn’t feel well, (1) he told his parents about that. His mum said, “You should eat (2) vegetables. You shouldn’t eat (3) every day.” His dad said, “You should go to bed (4) . You (5) stay up so late at night.” He phoned me and told me about the problems. I said, “Don’t play so (6) computer games. Go outside (7) play football.” He didn’t go to school last week. He went to (8) the doctor. The doctor said, “You should stay at home for a week. Don’t go out and don’t turn on your computer.” At school today, he looked sad. We asked him, “What’s (9) ? You should be happy. You weren’t here last week.” Ben is (10) his homework from last week. He’s not happy at all. 1.A. because B. or C. and D. but 2.A. more B. less C. most D. the more 3.A. ready food B. fresh food C. junk food D. traditional food 4.A. late B. lately C. earlier D. more earlier 5.A. should B. shouldn’t C. must D. needn’t 6.A. many B. much C. lot D. lots 7.A. or B. so C. and D. but 8.A. look B. look at C. find D. see 9.A. bad B. trouble C. problem D. wrong 10.A. doing B. making C. playing D. taking X. Make correct sentences from the words and phrases given. 1.You/ not/ play/ more/ computer games/ free time. 2.Doctor/ asking/ Mai/ questions/ about/ health problems. 3.Vitamins/ play/ important/ role/ our diet. 4.We/ keep/ our bodies/ warm/ avoid/ flu/ a cold. 5.Getting/ enough/ rest/ help/ you/ concentrate/ school.

Điều nào sau đây thể hiện đúng thứ tự xuất hiện của các nhóm động vật có xương sống khác nhau trong mẫu hóa thạch? * cá, động vật lưỡng cư, động vật có vú, bò sát lưỡng cư, bò sát, cá, động vật có vú cá, bò sát, lưỡng cư, động vật có vú cá, động vật lưỡng cư, bò sát, động vật có vú

Trong khai báo Pascal khai báo nào sau đây đúng? A. Var dien_tich : real; B. Var dien tich : real; C. Const dien_tich = real; D. Const dien_tich : real;

. Em hiểu như thế nào về ý nghĩ của nhân vật tôi ( tức ông giáo) qua hai câu văn: “ Cuộc đời quả thật cứ mỗi ngày một thêm đáng buồn.” và “ Không! Cuộc đời chưa hẳn đã đáng buồn hay vẫn đáng buồn nhưng lại đáng buồn theo một nghĩa khác.”

Complete the sentences with use, used to, be used to + V_ ing: 1 They...... live in Prague 2 Did you...... go there often? 3 We đin't...... recyle bottles until last year 4 No, you can't....... My car 5 Didn't you...... be an athete

I. Complete the words for the health problems. 1. st _ _ _ _ _ ache 2. e _ _ ache 3. s _ _ _ th _ _ _ _ 4. c _ _ _ 5. t _ _ _ _ che IV. Fill in each blank the correct health problem from the box according to the description. 1. : a pain caused by something being wrong with one of your teeth. 2. : a pain in your back. 3. : a very severe pain that you feel in your head. 4. : pain in your stomach. 5. : a pain in the inside part of your ear. 6. : a problem which is like a very bad cold, but which causes atemperature. 7. : a pain in your throat. 8. : a health problem that you make a lot of loud sounds.