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【多选题】
负反馈放大电路中，若反馈信号取样于输出电压，则引入的是 反馈，若反馈信号取样于输出电流，则引入的是 反馈；若反馈信号与输入信号以电压方式进行比较，则引入的是 反馈，若反馈信号与输入信号以电流方式进行比较，则引入的是 反馈。A.
电压
B.
电流
C.
串联
D.
并联
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【单选题】依《2010年国际贸易术语解释通则》的规定,某一贸易术语卖方应承担下列主要责任、风险和费用:(1)提供符合合同规定的货物;(2)自赞办理货物出口所需要的一切手续,包括心口许可证、海关手续等。(3)货物在指定的装运港、被装上买方指定的船上前,卖方承担货物灭失或损坏的一切风险和赞用。该贸易术语属于下列哪个国际贸易术语( )
A.
CIF
B.
CFR
C.
FOB
D.
FAS
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【简答题】Born in 1949, Diana Nyad took an early interest in swimming as a sport and was a Florida State High School swimming champion. Like many young athletes, she had Olympic dreams, but a serious illness ke...
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【简答题】A．There are 15 million Catholics in China. B．The number of Protestants in 1949 was 700,000. C．There are far more Protestants than Catholics in China. D．Most Christians live along the east coast.
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