题目内容

单稳态触发器只有一个稳定状态。（）

A. 对
B. 错

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多谐振荡器是一种自激振荡电路，不需要外加输入信号，就可以自动地产生矩形脉冲。（）

A. 对
B. 错

One morning there was a ______ on John's door.

Show me the tools and I'll be able to do a job that _____ you.

You are quite a _____ to build this bridge after all I've said and done.