薄板料錾切时将板料錾切线与虎钳口成平齐夹持，錾子刃口与虎钳口约成（）.
A.45°角
B.90°角
C.60°角
D.30°角
参考答案：A
— Do you know if Tom _____ fishing in the afternoon?
— I'm not sure. But if he _____ go, I won't go, either.[ ]
A. goes, won't
B. goes, doesn't
C. will go, doesn't
D. will go, won't
单比转账交易金额最低为（）。
A.10元
B.50元
C.100元
D.1000元
