在保证探伤灵敏度的前提下尽可能选用较低的频率。
参考答案:对
—I didn't go to class last night because my car broke down.
—You mine. I wasn't using it.[ ]
A. should borrow
B. might have borrowed
C. could have borrowed
D. must have borrowed
某演员进行一次商业演出,合同规定不含税演出费20000元,个人所得税为演出公司代付,则代付个人所得税为( )元。
A.457.43
B.3142.86
C.2880
D.3809.52