题目内容

The early train is ______ to leave at five in the morning.

A. possible
B. due
C. probable
D. sure

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Studies show that people are more ______ to suffer from back problems if they always sit before computer screens for long hours.

A. likely
B. possible
C. probable
D. sure

弹压卸料板装配时应保证与( )之间具有适当的间隙

A. 模板
B. 固定板
C. 凸模
D. 凹模

总装好模具经过试冲,要连续冲出多少个冲件且检验合格后才可正式交付使用( )

A. 30-50
B. 50-100
C. 100-150
D. 150-200

上.下模的装配次序与冲裁模的( )有关

A. 材料
B. 结构
C. 大小
D. 形状