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单项选择题
《劳动法》中,劳动安全卫生设施必须符合( )规定的标准。
A.国家
B.企业
C.行业
D.当地政府
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被马克思和恩格斯赞誉为“翻转整个世界”的伟大发明是什么?
A、蒸汽机
B、火药
C、指南针
D、电动机
单项选择题
下列哪一项不宜用来同时承受径向和轴向载荷?( )
A.圆锥滚子轴承
B.角接触轴承
C.深沟球轴承
D.圆柱滚子轴承
单项选择题
Our neighbors showed my family how much they cared when our home was destroyed by a fire. Which of the following examples does not support this general statement?
A、We have several generous neighbors.
B、Ms. Jones cooked meals for us each day.
C、The Williams family let us sleep in their guest bedroom.
D、Mr. Parker supplied lumber to rebuild our house
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