在单相桥式整流电路中，如果有一个二极管反接，则电路（）整流作用，负载中无电流流过。
参考答案：不起
写出下列句子的同义句。
1. This is my book. → The book is .
2. What's the name of your city? → What's your name?
3. I always go to school on foot. → I always to school.
4. What's your age (年龄)? → are you?
5. It's time for breakfast. → It's time breakfast.
在苏德战争中，苏军成功运用的军事战略理论是（）。
A.大纵深战役理论
B.空海一体作战理论
C.电子战理论
D.核武决战理论
