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【判断题】
反馈信号中只包含直流成份的反馈称为直流反馈。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
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【简答题】阅读理解。 A boy was born to a couple after eleven years of marriage. They were a loving couple and loved the boy very much. When the boy was around two years old, one morning the husband saw a medicine bo...
【简答题】D His first fight was for the equal rights of black people in South Africa. Then, as the first black president he fought to unite the country and organize the government. Now Nelson has set hi...
【简答题】During that time, white people were different from black people to me because they seemed to speak a strange language.
【简答题】A couple had a son eleven years after they married. They were a loving couple and the boy was the apple of their eye . When the boy was around four years old, one day the father was very tired after w...
【判断题】高压蒸汽灭菌一般采用0.105Mpa的压力,温度达121.3°C,维持15~30min,可杀灭包括细菌芽孢在内的所有微生物。这个说法是否正确( )。
A.
正确
B.
错误
【单选题】(), the number of private cars will increase sharply in the coming couple of years.
A.
Undoubtedly
B.
Doubtedly
C.
Undoubted
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