A __________ is a shaft to which a cam is fastened.
A. camshaft
B. crankshaft
C. piston
D. bearing
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Sliding friction between the _________ of the cam and the cam follower is considerable.
A. inside
B. front
C. surface
D. back
如果要列出一个目录下的所有文件需要使用命令行( )?(1.0)
A. ls -l
B. ls
C. ls -a
D. ls -d
在vim中,进入命令模式的快捷键是( )。(1.0)
A. ESC
B. ALT
Ctrl
D. Shift