葛上工程的整流站分接头采用什么控制方式。()
A.电压控制
B.触发角控制
C.熄弧角控制
D.空载电压控制
参考答案:D
It's the third time _______ late this month.
[ ]
A. that you arrived
B. when you arrived
C. that you've arrived
D. when you've arrived
盲视现象可以为( )提供证据。
A.空间知觉
B.无觉察知觉
C.内隐记忆
D.启动效应