电路如图所示,发生并联谐振时,已知I=20mA、Ic=10mA,IL最接近于()mA。
A.10
B.17
C.22
D.25
参考答案:C
More than 100 students in that school_________ abroad for further study so far.
A.are sent
B.were sent
C.had been sent
D.have been sent
根据“绿色通道”暂行管理办法,以下不属于鲜活农产品的是()。
A.冷冻鱼
B.西瓜
C.梧桐树
D.猪