问题
填空题
测试信号调理电路主要有（）、（）、（）。
答案
参考答案：电桥、放大、调制解调电路
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测试信号调理电路主要有（）、（）、（）。
参考答案：电桥、放大、调制解调电路
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| Swimming is very popular in summer. People like swimming in summer because water makes people 1 cool. If you like swimming and swim in 2 place, it may not be safe. These years more than ten thousand people died while they were enjoying 3 in the water, and most of them were students. But some people are still not 4 in swimming. They often think they swim so 5 that nothing can 6 to them in water. Summer is here again. If you go swimming in summer, don't forget that better 7 have died in water. They died because they were not careful, not because they could not 8 . So don't get into water when you are 9 . If there is a "No swimming" sign, don't get into water, 10 . If you remember these, swimming will be safe. | |||
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