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【单选题】
劳动者与用人单位签订 劳动合同 必须具备订立合同的主体资格, 劳动合同法 禁止用人单位招用未满( ) 周岁 的未成年人 , 文艺、体育、 特种工艺单位录用未满16周岁的未成年人必须履行审批手续。A.
18
B.
10
C.
15
D.
16
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皮皮学刷刷变学霸
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【单选题】For a first-order process A→P, the initial concentration of A is 0.65 M. After 20 minutes elapse, the concentration of A is 0.35 M. What is the rate constant for this process?
A.
0.031 s -1
B.
5.2 x 10 -4 s -1
C.
-5.2 x 10 -4 s -1
D.
1.9 s -1
【简答题】The Argentine peso was fixed through a currency board at Ps1.00/$ throughout the 1990s. In January 2002 the Argentine peso was floated. On January 29, 2003, it was trading at Ps3.20/$. During that one...
【单选题】理想气体在高温热源温度ＴH 和低温热源温度ＴL 之间的卡诺循环的热效率为______。
A.
(ＴH–ＴL )/ＴH
B.
ＴH /(ＴH–ＴL )
C.
ＴL /(ＴH–ＴL )
D.
(ＴL–ＴH ）/ＴL
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