在接有理想电容的直流电路中,闭合的瞬时()。
A.不存在电阻
B.存在电阻
C.不存在电流
D.存在电流
参考答案:A
气力除灰系统一般用来输送()。
It’s reported that many policemen were sent to the forest ____________ the missing boy.
A.in need of
B.in favor of
C.in honor of
D.in search of