问题
问答题 简答题
防毒面具由哪几部分组成？
答案
参考答案：
一般防毒面具由橡胶面罩、导气管、滤毒罐和背包四部分组成。
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防毒面具由哪几部分组成？
参考答案：
一般防毒面具由橡胶面罩、导气管、滤毒罐和背包四部分组成。
| 用方框中所给动词的适当形式填空，（每词限用一次）。 | |
Emma: Oh, I have a toothache now. Doctor: How long have you 1______ like this? Emma: For three days. And I 2______ not sleep last night. Doctor: Open your mouth and let me look them over. Oh, one of your teeth is bad. It must be 3______ out. Emma: It 4______ terrible. You'd better give me other advice. Perhaps it will be OK tomorrow. Doctor: I don't think so. Emma: All right. What should I do? Doctor: You won't 5_____ anything hard in many days after the operation (手术). Emma: OK. Thank you very much. Doctor: Not at all. |