电源的两端由于某种原因联在一起时叫做短路
参考答案:错
Every minute must be made full use of __ our lessons, for the college entrance exam is coming.[ ]
A. going over
B. to go over
C. go over
D. our going over
下列交通运输工具中,在第一次工业革命时期发明创造的有( )
A.火车
B.汽车
C.汽船
D.飞机