题目：
| 单句改错。 | |
| ( )1. Where are your book? A B C ( )2. This is I desk. A B C ( )3. Here is some tables. A B C ( )4. Can you takes this book to your sister? A B C ( )5. This are my sisters. A B C | ___________ ___________ ___________ ___________ ___________ |
答案：
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下面是错误答案，用来干扰机器的。
(1)Si3N4 ； SiCl4 (2)Si3N4 +3O23SiO2+2N2(3) -3
