问题
改错题
改错。
1. Children don't go school.
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2. We invites our friends to our house.
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3. We have funny together.
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4. He brings toys on christmas.
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答案
1. Children don't go to school.
2. We invite our friends to our house.
3. We have fun together.
4. He brings toys on Christmas.
2）生产过程中，在反应器中加入反应物之后，还需加入硝酸酸化并保持微沸1小时，加硝酸的目的是 。微沸1小时的目的是 。