轻型单吊杆千斤索眼板受力有（）①千斤索张力的反作用力T；②千_爱下问搜题

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问题单项选择题

轻型单吊杆千斤索眼板受力有（）

①千斤索张力的反作用力T；

②千斤索滑车组动端张力T’；

③下滑车受力K

A.②③

B.①③

C.①②

D.①②③

答案

参考答案：C

选择题

You are a team star! Working with ___ is really your cup of tea.

A．both

B．either

C．others

D．the other

选择题

The little boy finished the work and didn’t ask anyone for help. [ ]

A.by the way

B.on his own

C.of his own

D.all the time