汽车用电容器的作用之一是减小触点分开时的(),保护触点。
A.电流
B.电压
C.电阻
D.火花
参考答案:D
The weather turned out to be fine. I the trouble to carry the umbrella with me.
A.should have taken
B.needn’t have taken
C.mustn’t have taken
D.could have taken
关于钢筋连接方式,正确的是()。
A.焊接
B.普通螺栓连接
C.铆接
D.高强螺栓连接