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根据汉语意思完成英文 根据汉语意思完成英文句子. 1.微波炉可以用来煮饭.    A mi

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根据汉语意思完成英文
根据汉语意思完成英文句子.
1.微波炉可以用来煮饭.
    A microwave oven can _____  _____  _____ cooking.
2.你必须亲自去签收,他们不能邮寄过来就算完事.
    You have to go sign for it _____  _____,they can't just mail it.
3.人类怎么会说这么多种语言,这种情况是如何产生的呢?
    How did it _____  _____ that humans speak so many different languages?
4.老师告诉我们噪音对我们的耳朵伤害很大.
    The teacher told us that noise _____ very _____  _____ our ears.
5.在每一项发明被发明出来之前,爱迪生总要做大量的实验.
    Before each invention was invented,Thomas Edison always did _____  _____  _____  _____.
1.be used for   2.in person   3.come about   4.is; harmful to   5.a lot of experiments