Nhận biết các lọ mất nhãn sau: HCl, NaOH, Na2S, Na2SO4, NaCl, NaN

Câu 2 : Từ “ loắt choắt ” trong câu : “ Chú bé loắt choắt ” thuộc loại từ nào ? A. Từ đơn B. Từ láy C. Từ mượn D. Từ ghép.

Khi cho CaC2 tác dụng với nước, thu được sản phẩm khí là A: hiđro. B: metan. C: axetilen. D: etilen.

các bạn giải chi tiết giúp mình nha đừng giải tắt ạ mình khuyên các bạn nên giửi hình bằng giấy ạ mình cảm ơn các bạn ạ

Put the following questions into indirect speech 1. If I were you, I’d read the exam questions very carefully Teacher said. Teacher advised Minh .... 2. You had better not waste your time, Betty Tom said. Tom advised .... 3. “Shut the door but don’t lock it.” I said to him. I told ... 4. Don’t forget to give the book to Jane. David said. David reminded ... 5.Tell me what you saw at the party yesterday I said to Tom. I ... 6. “Be modest if you are a good pupil, Lan.” said her mother. ..... 7. “Don’t play with the matches!” I said to Jack. I warned ...... 8.Don't swim out too far, boys. said the pool guard. The pool guard warned.....

help me các bn VIII. Choose the best sentence that can be made from the cues given. Question 36. We/ use/ art/ communicate/ 200 years. A. We will be using art to communicate in 200 years. B. We will use art for communicating for 200 years. C. We will have used art to communicating in 200 years. D. We will be using art for communicating by 200 years. Question 37. I/ look forward to/ hear/ you/ soon. A. I am looking forward to hearing from you soon. B. I am looking forward to hear from you soon. C. So am I looking forward to hear from you soon. D. I look forward to hear from you soon. Question 38. The number/ English speakers/ increase/ recent years. A. The number of English speakers increase in recent years. B. The number of English speakers have increased in recent years. C. The number of English speakers increased in recent years. D. The number of English speakers has increased in recent years. Question 39. According/ latest report/ the number/ people/ injured/ typhoon/ nearly/ 150. A. According to the latest report, the number of people injured in the typhoon was nearly 150. B. According to the latest report, the number of people were injured in the typhoon were nearly 150. C. According to lastest, the number of people injured in the typhoon were nearly 150. D. According to the lastest report, the number of people have injured in the typhoon was nearly 150. Question 40. Tsunamis/ also/ refer/ the public/ tidal waves. A. Tsunamis also referred to the public as tidal waves. B. Tsunamis also refer to the public as tidal waves. C. Tsunamis is also referred as the public as tidal waves. D. Tsunamis are also referred to the public as tidal waves.

cho hình chóp SABCD đáy ABCD là hình vuông cạnh a, SA _l_ (ABCD); SA = a căn 6 tính sin của các góc tạo bởi : ac và (sbc) giúp mình với

MỌi người ơi giúp mình bài 2 với

Mai tui hoc r ai giup tui vs huhu

Các bạn ơi giúp mk với mk đang cần gấp mk cảm ơn trc