Cho ` ΔABC` cân tại `A` , đường cao `AH` `(H ∈BC)` `a)` Chứng minh ` ΔAHB= ΔAHC` `b)` Gọi `D` là trung điểm của `HC` , qua `D` vẽ đường thẳng vuông góc với `BC` cắt cạnh `AC` tại `E` . Chứng minh ` ΔEHC` cân `c)` Chứng minh `E` là trung điểm `AC` `d)` Gọi `G` là trọng tâm ` ΔABC` . Chứng minh $BC+AG>4GE$

I. Choose the word that has the underlined part pronounced differently from the rest. (1) 1.A. allow B. follow C. blow D. know 2.A. pear B. wear C. pearl D. bear 3.A. danger B. behave C. basket D. baseball 4.A. soon B. room C. moon D. foot II. Choose the best answer. (3 points) 1.I’m not sure where Tom is. He _________ be in the school canteen. A. must B. should C. might D. can 2.- We don’t have a TV at our place. - _________? A. Why so B. Why not C. Why not so D. Why don’t you 3._________ did she go to the dentist last week? A. When B. What C. Why D. Who 4.They kept _________ touch _________ letters. A. in / by B. on / by C. in / with D. on / with 5.She sings _________ . A. beautiful B. nice C. beautifully D. lovely 6.You speak Japanese. _________. A. So do I. B. Either I can. C. So am I. D. Neither do I. 7.This food tastes _________. A. delicious B. careful C. deliciously D. carefully 8.Teenagers often like _________ the latest pop music. A. to listen B. listening to C. listen D. listening 9.- _________ to have dinner at my house ? - Yes. I’d love to. A. Do you like B. Would you like C. What about D. Let’s 10.Choose the word that has the same meaning as the underlined phrase. I’m not busy on Wednesday. A. tired B. late C. free D. hungry III. Supply the correct form of the verbs in brackets. (1.5 points) I (watch) ………..…Crime Reported on television last night and (enjoy) .it a lot. The first few scenes (be) ……...rather dull, but later the program (become) ….………very interesting. I also like the policeman on yesterday’s program because he talked about unusual crimes and he (explain) …………....everything very clearly. He also (give) ……………………. very good answers to all the questions.

Giải hộ mình ý 2 của câu b với ạ ( tính khoảng cách ......)

Huhu, làm gấp giúp em với ạ!! Giải thích giúp em luôn nha!!

I. Choose the word that has the underlined part pronounced differently from the rest. (1) 1.A. allow B. follow C. blow D. know 2.A. pear B. wear C. pearl D. bear 3.A. danger B. behave C. basket D. baseball 4.A. soon B. room C. moon D. foot II. Choose the best answer. (3 points) 1.I’m not sure where Tom is. He _________ be in the school canteen. A. must B. should C. might D. can 2.- We don’t have a TV at our place. - _________? A. Why so B. Why not C. Why not so D. Why don’t you 3._________ did she go to the dentist last week? A. When B. What C. Why D. Who 4.They kept _________ touch _________ letters. A. in / by B. on / by C. in / with D. on / with 5.She sings _________ . A. beautiful B. nice C. beautifully D. lovely 6.You speak Japanese. _________. A. So do I. B. Either I can. C. So am I. D. Neither do I. 7.This food tastes _________. A. delicious B. careful C. deliciously D. carefully 8.Teenagers often like _________ the latest pop music. A. to listen B. listening to C. listen D. listening 9.- _________ to have dinner at my house ? - Yes. I’d love to. A. Do you like B. Would you like C. What about D. Let’s 10.Choose the word that has the same meaning as the underlined phrase. I’m not busy on Wednesday. A. tired B. late C. free D. hungry III. Supply the correct form of the verbs in brackets. (1.5 points) I (watch) ………..…Crime Reported on television last night and (enjoy) .it a lot. The first few scenes (be) ……...rather dull, but later the program (become) ….………very interesting. I also like the policeman on yesterday’s program because he talked about unusual crimes and he (explain) …………....everything very clearly. He also (give) ……………………. very good answers to all the questions.

Cho mình hỏi làm sao ta biết được trong hệ thức vi-et x1=1?

Huhu, làm gấp giúp em với ạ!! Giải thích giúp em luôn nha!!

Hoàn cảnh bùng nổ , diễn biến , thành phần lãnh đạo , lực lượng tham gia, các cuộc khởi nghĩa tiêu biểu ,nguyên nhân thất bại và ý nghĩa của phong trào cần vương cuối tớ 19

Huhu, làm gấp giúp em với ạ!! Giải thích dùm em luôn nha

III. Fill into the blanks with suitable words. (3 points) Americans like sport very much. One of the (1) ……popular kinds of sports in Autumn is football. All the high schools (2) ………universities have their own teams.In winter the most popular kind of sports (3) …………..basketball. There is usually a match every evening in one school gymnasium or another. In some parts of the United States there is a lot of (4) ………and ice. Many people like skiing and skating.In the other two (5) ………., millions of Americans enjoy baseball. The schools have their games in (6) ………., but the most important professional games are played during summer. Many people listen to the games (7) ………..the radio, watch them on television or read about them (8) ………….the newspapers. Some also play tennis or golf and others (9) …………fishing. They like to stay outdoors (10) ………….it is warm during the months of June, July and August. IV. Choose the part that need correcting. (2 points) 1.Minh doesn’t like pork, and Lan doesn’t, too. A. doesn’t like B. pork C. and D. too 2.Hoa told me that her aunt cutted her hair yesterday. A. told B. her aunt C. cutted D. her hair 3.He doesn’t know how to take care for himself. A. doesn’t B. how C. to take D. for 4.Last week, Mrs. Lien fell tired, so she went to see the doctor. A. fell B. so C. went D. the 5.The dirt on the vegetables can make you sickness. A. dirt B. sickness C. make D. vegetables V. Rewrite the following sentences using the words given. (1 point) 1.What was Lan’s height last year? => How ……………………….. 2.Mary likes to eat ice-cream and Peter likes to eat ice-cream. => Mary likes………………………………