题目内容

－Is John sick?－Yes,all night in the rain caused him to catch a cold.

A. he worked
B. him to work
C. he working
D. his working

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Do you think there will be any chance ofto the farthest reaches of the solar system?

A. men being sent
B. men were being sent
C. men were sent
D. men sending

work means moving a body through a distance by a force.

A. Having done
B. To do
C. Doing
D. Being done

变量泵是指可以改变的液压泵，常见的变量泵有单作用叶片泵、轴向柱塞泵和径向柱塞泵。其中，通过改变斜盘倾角来实现变量。

A. 输出流量；轴向柱塞泵
B. 输出流量；径向柱塞泵
C. 输出压力；轴向柱塞泵
D. 输出压力；径向柱塞泵

“材料成本差异”科目借方余额反映结存材料成本的( )。

A. 节约差异
B. 计划成本
C. 超支差异
D. 实际成本