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肩关节扭伤时如何处置?

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天大寒,砚冰坚,(),弗之怠。

By regulation,your cargo vessel must have().

A. sufficient facilities for the crew to wash their clothes
B. a wash basin in each room
C. separate toilet facilities for engineers where their number exceeds six
D. All of the above

简述单元式多层住宅的设计思路。

砧子上的氧化皮无关紧要,不影响生产和工具的使用。

A. 正确
B. 错误

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