特高频检测可用外施高压电源进行同步，并可通过（）的方式，对测量信号进行观察和分析。
A.移相
B.换相
C.同相
D.同步
参考答案：A
The man as well as his horse ____ crossed the river ____ from Tokyo. [ ]
A. which, come
B. that, comes
C. who, came
D. who,come
对中间突起的板料，进行矫直时，可直接锤击突起部分，从而使板料变平。
