user-avatar
hanhdung110907
2 năm trước
Chỉ dùng một thuốc thử hãy phân biệt các chất bột chứa trong các lọ mất nhãn sau: $CuO,Fe_{3}O_{4},Ag_{2}O,MnO_{2},(Fe+Fe_{2}O_{3})$
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

ai giúp em với ạ 1. She admitted that she has taken the necklace.-> She admitted …………………………………………… 2. I don’t intend to tell you my plans.-> I have no intention………………………………………… 3. We tidied the room. Our mother made us.-> Our mother made………………………………………………. 4. Long found it difficult to concentrate on her lesson because of noise.-> Long had difficulty…………………………………………………… 5. Tom was playing football. Jenny saw this.-> Jenny saw………………………………………. 6. He tried to escape but the police stopped him.-> The police prevented him …………………………. 7. John began playing the piano ten years ago.-> John has…………………………………………. 8. I can’t possibly work in all this noise!-> It is impossible………………………………………… 9. Susan regrets not buying that house.-> Susan wishes…………………………………………….. 10. Smoking is not allowed on the public buses. -> They don’t allow ………………………………………………….............. 11.When they got the message, they felt so surprised. => On............................................................................................... 12. The cat ate the mouse. I saw this. => I saw............................................................................................................ 13. Mary watched TV too much so she felt dizzy. => After having.......................................................................................... 14. Tom is having a neighbor harrow his land. => Tom is having............................................................................................. 15. They will get me to finish their work soon.=> They will.......................................................................................................... 16. You dont need to do all the washing up. => There............................................................................................................... 17. He should not make so much noise. It is useless. => There is no....................................................................................... 18. They built the house. They left the town. => Having.......................................................................................................... 19. She keeps silent. She does not want to be noticed. => So as............................................................................................. 20. Tom hoped his friends to send him a special gift this Christmas. => Tom hoped..............................................................................................................

ai giúp em với ạ 110. I can’t help .......................... for her acceptance. A) to wait B) waiting C) wait D) waited 111. Don’t be afraid of .......................... that animal. A) touch B) touches C) touching D) to touch 112. I am accustomed to ......................... on my own. A) living B) to live C) live D) lives 113. They are looking forward ...................... some news. A) hear B) to hear C) to hearing D) hearing 114. American women have got used to .................independently recently. A) live B) to live C) living D) lives 115. We won’t let you............... what we are going to do with him. A) know B) to know C) knowing D) known a. rebuild b. to rebuild c. rebuilding d. to rebuilding 116. The mechanic needs____a new muffler on your car. a. to put b. putting c. to be put d. to putting 117. Our house needs_______a. to paint b. to be painting c. to be paint d. painting 118. Do you want _____by the doctor? a. to examine b. to be examined c. being examined d. being to examine II. Re write:

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team