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【单选题】
下列哪一个变量属于存量A.
国民生产总值
B.
年生产力
C.
国民收入
D.
固定资产价值
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皮皮学刷刷变学霸
举一反三
【单选题】Pity those who aspire to put the initials PhD after their names. After 16 years of closely supervised education, prospective doctors of philosophy are left more or less alone to write the equivalent o...
A.
most of them died of some sickness
B.
their holidays and evenings have been ruined by their jobs
C.
most of them are completely tired of the narrowly defined subject
D.
most of their grants run out
【单选题】She'll be back to her hometown_____time. [ ]
A.
after a few years'
B.
in a few years'
C.
after a few years
D.
in a few year's
【简答题】带传动中,打滑是指( ),多发生在( )轮上。即将打滑时紧边拉力 F 1 与松边拉力 F 2 的关系为( )。
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