cho em hỏi thành phần chính của bột đá phấn là gì ạ

Ai giải thích và làm giúp em với ạ em hứa cho 5 sao và câu trả lời hay nhất ạ. Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best fits the meaning of the given one. Question 33: Have they ever been to the Philippines? A. They have ever been to the Philippines, have they? B. They have ever been to the Philippines, don’t they? C. They have ever been to the Philippines, has they? D. They have ever been to the Philippines, haven’t they? Question 34: I'd rather you didn't smoke here. A. Would you mind not smoking here? B. Would you mind not smoke here? C. Would you mind if I didn’t smoke here? D. Would you mind not to smoking here? Question 35: It was such a cold day that we stayed indoors. A. The day was so cold for us to stay indoors. B. The day is so cold that we stayed indoors. C. The day was so cold that we stayed indoors. D. The day was so cold that we stay indoors. Question 36: Although Peter tried hard, he couldn't start his car. A. No matter hard Peter tried, he couldn't start his car B. No matter how Peter tried hard, he couldn't start his car C. No matter how hard Peter tried, he couldn't started his car D. No matter how hard Peter tried, he couldn't start his car Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best fits the combination of the given sentences. Question 37: It doesn’t rain in winter. People in this area lack water. A. It doesn’t rain in winter, so people in this area lacks water. B. It doesn’t rain in winter, so people in this area lack water. C. It doesn’t rain in winter, so people in this area is lack water. D. It didn’t rain in winter, so people in this area lack water. Question 38: John woke up late. He didn’t have time for breakfast. A. John woke up too late for have time for breakfast. B. John woke up late to have time for breakfast. C. John woke up too late to have time for breakfast. D. John woke up late enough to have time for breakfast. Question 39: Neil Armstrong lived in the USA. He walked on the moon. A. Neil Armstrong, who walked on the moon, lived in the USA. B. Neil Armstrong who walked on the moon lived in the USA. C. Neil Armstrong, whom walked on the moon, lived in the USA. D. Neil Armstrong, that walked on the moon, lived in the USA. Question 40: I don’t have money. I can’t buy that house A. If I have money, I would buy that house. B. If I had money, I would buy that house. C. If I had money, I will buy that house. D. If I had had money, I would have bought that house.

giup em voi a mn oi aaaaaaaaaaaa

Giải giúp mình với cảm ơn nhiều

Hòa tan hết a gam kim loại Na trong dung dịch HCl. Sau phản ứng người ta thu được dung dịch A và 3,36 lít H2 (đktc). a. Tính a? b. Tính khối lượng các chất tan trong dd A biết rằng lượng axit dùng cho thí nghiệm trên phản ứng vừa đủ với 3,25 gam Zn

Phân tích đa thức thành nhân tử Help me please Làm đủ tất cả nha ko cần chi tiết chỉ cần đáp án thoiii.!?

Một ca nô chuyển động đều trên dòng sông.Vận tốc của ca no khi xuôi dòng là 22km/h và khi ngược dòng là 18km/h. a/Nếu ca nô không nổ máy thì quãng đường mà nó trôi theo dòng nước trong vòng 15p là bao nhiêu? b/Gỉa sử mặt nước yên tĩnh, ca nô nổ máy thì vận tốc của nó lúc đó là bao nhiêu?

Đặt 1 câu có thành phần biệt lập cảm thán khi phân tích hình ảnh bếp lửa trong bài thơ Bếp lửa

đặt slogan tập thể với từ high (10 câu)

Cho tam giác ABC vuông tại A.Một đường thẳng d cắt hai cạnh AB,AC theo thứ tự tại các điểm D,E.GỌI IJKH là TĐ DE,BE,DC,BC.CMR IJHK LÀ hcn.