试题与答案

请求闭塞的条件:确认()空闲,且()准备好后,方可请求闭塞。

题型:填空题

题目:

请求闭塞的条件:确认()空闲,且()准备好后,方可请求闭塞。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:根据电流作用对人体的表现特征,确定各样50~60赫兹的交流电10毫安和直流电50毫安为人体安全电压。

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五、单词填空

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78. The businessman_____________ (抛弃) his wife and went away with all their money.

79. The witness gave a very _______________ (生动的) description of the accident this morning.

80. You must be very careful to cut meat with this ______________ (锋利的) knife.

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