user-avatar
2000cungvietuocmo
2 năm trước
Nung nóng 3,2g đồng kim loại (Cu) và 784 ml khí O2 (đktc). Tính khối lượng CuO tạo thành sau phản ứng
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Mark the letter A, B , C , or D to indicate the sentence which is closed in meaning to the original one. 1. I didn’t talk to foreigners until the third year. A. It was not until the third year that I talked to foreigners. B. It was not until the third year I talked to foreigners. C. It was not until the third year English could talk to foreigners. D. Before the third year, I talked to foreigners. 2. The boy next door didn’t stop singing until 10 O’clock. A. It was not until 10 O’clock the boy next door stopped singing. B. It was not until 10 O’clock that the boy next door stopped singing. C. It was not until after midnight that the boy next door stopped singing. D. After 10 O’clock the boy next door didn’t stop singing. 3. The farmer didn’t finish his work until Sunday. A. On Sunday the farmer didn’t finish his work. B. It was not until Sunday the farmer had finished his work. C. It was not until Sunday that the farmer finished his work. D. It is Sunday since the farmer didn’t finish his work. 4. I didn’t know how to play the guitar until I was fifteen. A. It was not until I was fifteen that I knew how to play the guitar. B. It was not until I was fifteen that I had known how to play the guitar. C. How to play the guitar didn’t know until I was fifteen. D. When I was fifteen, I know how to play the guitar. 5. He didn’t do his homework until he his mother returned home. A. It was not until his mother returned home that he did his homework. B. He does homework when his mother returns home. C. He did homework very late at night. D. Until very late at night, he doesn’t do his homework.

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