在纯电感正弦电路中,下列各式()是正确的。
A.i=U/ωL
B.I=U/ωL
C.I=Um/ωL
D.i=u/ωL
参考答案:B
As long as you are confident and determined, you will _______ whatever difficulties you face.
A.overcome
B.confirm
C.grasp
D.acquire
腐烂的水果会散发出酒昧,这主要是下列哪种生物在水果中大量繁殖的结果( )
A.霉菌
B.酵母菌
C.乳酸菌
D.大肠杆菌