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【单选题】
取出液压挺柱时,需用到的工具有()。答案A.
套筒
B.
十字螺丝刀
C.
吸棒
D.
液压千斤顶
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反馈参考答案：
举一反三
【多选题】Under what circumstances would people like to listen with more effort?
A.
People would like to listen to polite requests.
B.
People would like to listen to attention grabbers.
C.
People would like to listen for shared agreements.
D.
People would like to listen for protecting rightness.
【简答题】People listen to it to enjoy themselves．
【简答题】People listen to news through it.
【简答题】People listen to it to enjoy then selves.
【简答题】People listen to news on it.
【多选题】关于砌体结构特点的说法，正确的有（）。
A.
砌体材料抗压性能好
B.
结构保温性能好
C.
可用作跨度小于20m的中小型厂房的墙体、柱和基础
D.
结构耐火性能差
E.
砌体的受力特点是抗压强度较高而抗拉强度很低
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