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问题 单项选择题

气动伺服气缸打不开时，当输入压力达到或超过0.02MPa时工件不工作，则是（）。

A、行程匹配不当

B、零点调节螺丝松动

C、节流调节不合理

D、放大倍数设置不合理

答案

参考答案：B

改错题

短文改错（共10小题，每小题1分，满分10分）

I felt sadly yesterday when our teacher told us something 　   小题1:               

about Project Hope in class. It has set up to help the 　　    小题2:               

children in the countryside who can't afford to going to 　  小题3:               

school. After school I come home. I was wondering if I 　　    小题4:               

could do something for the Project then I caught sight 　　    小题5:               

of my money-collecting box on the table. But I made 　       小题6:               

up my minds to send my pocket money to the children　　　    小题7:               

who wanted to go to school. I wrote with a letter to them and　 小题8:               

hurried to the post office. I posted the money and sent her　 小题9:               

best wishes together with the letter to them.                 小题10:            
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单项选择题

1956年，美国的杜邦和兰德公司为了协调公司内部不同业务部门的工作，提出了( )，取得显著效果。

A．甘特图

B．计划评审法

C．网络图

D．关键路线法
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