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【单选题】
车削M20X1.5的螺纹,螺纹车削指令为:N20 G0 X20 Z5;N30 G92 X19.805 Z-20 F0.3;下列说法全部正确的是( )。A.
F改为F1.5
B.
循环起点改为(22,5)、F改为F1.5
C.
循环起点改为(22,5)、N30的X改为X19.2、F改为F1.5
D.
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举一反三
【单选题】听力原文：M: I haven't heard from Nancy since she entered medical school. I wonder how she's doing. W: Well, I understand she gave our department secretary her new address and phone number. Why don't you t...
A.
Visit Nancy at her new department.
B.
Call on Nancy at her medical school.
C.
Give the secretary Nancy's new phone number.
D.
Get information about Nancy from the secretary.
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