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【简答题】
已知一物块重P＝100N，用水平力F＝500N压在一铅直表面上，如图5-1所示，其摩擦因数f s ＝0.3。问此时物块所受的摩擦力等于多少?
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【单选题】人力资源规划的步骤有：①提供人力资源信息；②评估人力资源规划；③组织目标与战略分析；④供需匹配；⑤执行计划与实施监控；⑥人员预测。对其排列顺序正确的是( )。
A.
①③⑥④⑤②
B.
③①⑥④⑤②
C.
③①④⑥⑤②
D.
③①⑥⑤④②
【简答题】I was 15 when I walked into McCarley’s Bookstore in Ashland. As I was looking at ___1___ on the shelves, the man behind the counter, ___2___, asked if I’d like ___3___. I needed to start ___4___ for c...
【单选题】阿罗不可能定理的表述为
A.
不用满足一切民主要求就能排除循环投票困境的决策机制是存在的
B.
满足一切民主要求又能排除循环投票困境的决策机制是不存在的
C.
不满足一切民主要求就不可能排除循环投票困境的决策机制
D.
满足一切民主要求就不可以排除循环投票困境的决策机制
【简答题】改造过程中，某些公共建筑需更换强化木地板，则其耐磨转数应不小于( )。 A. 3000转 B．6000转 C．9000转 D.12000转
【单选题】—Why is Harvey's mother so happy? —Because only three students _____, _____ his son Harvey. [ ]
A.
failed the exam;besides
B.
made progress;except
C.
made progress;including
D.
passed the exam;without
【单选题】Here's my simple test for a product of today's technology: I go to the bookstore and check the shelves for remedial books. The more books, the more my suspicions are raised. If computers and computer ...
A.
very few companies are publishing such books
B.
more and more people are learning computers
C.
computers and computer programs are not easy to learn
D.
books on how to use computers can be sold at a high price
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