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【判断题】
利用电容元件通直流、阻交流的作用，或电感元件通交流、阻直流的作用，可实现滤波，即滤除信号中的交流成分。（）A.
正确
B.
错误
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举一反三
【简答题】用方框中所给单词的适当形式填空 like, prefer, strirg,late, fish, sink, remind, lyric 1. This is a famous author's________book. I like it very much. 2. There are many________near the Yellow River. They live by fishi...
【简答题】Long ago, there was a big cat in the house. He caught many mice while they were stealing food. One day the mice had a meeting to talk about the way to deal with their common enemy. Some said this, and...
【简答题】前人把单味药的应用同药物与药物之间的配伍关系总结为 、 、 、 、 、 和 七类,称为药物的七情。
【单选题】When there is a tie at 29-all, in which the game goes to a ____point.
A.
Golden
B.
Final
C.
Last
D.
Good
【简答题】听第7段材料，回答第8至10题。 M: Where did you put my new red tie? W: It's right there in the cupboard with your other ties. M: There's a green one and a couple of brown ones, but no red one. W: Here it is in your...
【简答题】前人把单味药的应用同药物与药物之间的配伍关系总结为____、____、____、____、____、____、____七类,称为药物的七情。
【单选题】听力原文：M: Where did you put my new red tie? W: It's right there in the cupboard with your other ties. M: There's a green one and a couple of brown ones, but no red one. W: Here it is in your drawer. You...
A.
3.
B.
4.
C.
5
【单选题】____是以二氧化碳气体为动力喷射干粉灭火剂的器具,主要用于扑救油类、易燃液体、可燃气体(固体)和电气设备的初起火灾。
A.
二氧化碳灭火器
B.
干粉灭火器
C.
泡沫灭火器
D.
清水灭火器
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