问题
选择题
| 下列物质中，属于共价化合物的是（ ） A．NaCl B．Na2O C．CaCl2 D．C02 |
答案
答案：D
搜题请搜索小程序“爱下问搜题”
| 下列物质中，属于共价化合物的是（ ） A．NaCl B．Na2O C．CaCl2 D．C02 |
答案：D
下列句子均有一处错误，把正确答案写在题后的横线上（保持句子意思不变）。
| 1. There are four peoples in my family. | |
| 2. Are those your friend? | |
| 3. That is his father friend. | |
| 4. This isn't her bag. It's I bag. | |
| 5. -What are these? | |
| -These are apples. | |
| 6. Are they your grandparent? | |
| 7. -Dad, he is my friend, Tom. |
-Hello, Tom
8. Excuse me, is that yours watch?
9. Mr Green is Jim father.
10. What's a name of his cat?