Đầu tháng 8 - 1975, 35 nước châu Âu cùng với những nước nào ký kết Định ước Hen – xin – ki ?

Cho tam giác ABC vuông ở A, đường cao AH=h, BC=a. Vẽ HD⊥AB, HE⊥AC. Đặt BD=m, CE=n. Chứng minh rằng: a) h ³=amn b) Căn bậc 3 của a ² = căn bậc 3 của m ² + căn bậc 3 của n^2

CHANGE THE FOLLOWING SENTENCES ACTIVE INTO PASSIVE VOICE 1 Yes -No question(trả lời các câu hỏi sau bằng câu bị động) 1Do they teach English here? 2Will u invite her to your wedding party? 3Is she going to write a poem? 4Did the teacher give some exercises ? 5Hve they changed the window of the laboratory? 6Is she making a big cake for the party? 7Has Tom finished the work? 8Are the police making inquires about the thief? 9Must we finish the test before ten? 10 Will buse bring the children home? / /

Rewrite the following sentences with the words given in the way that the rewritten one is closest in meaning with the original one. Question 29: My father smoked twenty cigarrettes a day. But now he doesn’t. My father used to__________________________________________________________ Question 30 : This story is about an old man. He doesn’t know how to use a computer. (Combine these two sentences using who)________________________________________________________________________ Question 31: The children have played football for two hours. ( Write Passive voice sentence) 3 Football ________________________________________________________________Use the correct form of the verb in bracket. Question 32: They are now teaching ______________ to the children. (photograph)Make question with the underlined words Question 33: They like Maths and English________________________________________________________________Write a complete sentence with the given words ' Question 34: Could/ tell/ me/ what/ a cell phone/ use ?________________________________________________________________

1/1 × 2 + 1 / 2 ×3 + 1/3 ×4 + 1/4 ×5 + 1/5 ×6

Mn vẽ cho mik ảnh này nha - Ko vẽ ẩu - Ko vi phạm luật hỏi đáp - có chữ kí Thế nhé ~, vẽ đẹp vào đó, có màu thì càng tốt

Chuyển sang câu bị động: 1.Who wrote it? 2.Did you send her a present yesterday?

UwU, em đang cần gấp ạ Mong mn giúp em ạ

cần các bn khoan hộ mấy câu trắc nghiệm mik cảm ơn

Cho 5,6 g Fe vào HCl ta thu được FeCl2 , và H2 -> tính mFeCl2, VH2 giúp !!