当起重机运行到轨道终端并与设在终端的止挡相撞时，缓冲器能吸收碰撞的能量，使起重机能平稳地停车。

(     )——This guy has a lot to complain about everythin...

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A、Mr. Right 
B、Mr. Family Man 
C、Mr. Grumpy
D、Mr. Parasite

爱岗敬业的基本要求表现在树立强烈的事业心和责任感。 A、正确B、错误

单项选择题爱岗敬业的基本要求表现在树立强烈的事业心和责任感。

串行数据通信是指以字节或字为单位的数据传输方式。A．对 B．错

单项选择题串行数据通信是指以字节或字为单位的数据传输方式。