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【简答题】
17 单原子理想气体 A 与双原子理想气体 B 的混合物共 5mol ,摩尔分数 y B = 0.4 ,始态温度 T 1 = 400K, 压力 p 1 = 200kPa 。今该混合气体绝热反抗恒外压 100kPa 膨胀到平衡态。求末态温度 T 2 及过程的 W 、 Δ U 、 Δ H 。
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【单选题】Mike is an extremely careless man. ________, it was not until he got to an ATM that it occurred to him he had left his card at home.
A.
On one occasion
B.
ashamed of
C.
In my mind ’ s eye
D.
recurring
【简答题】— Is it true that Mike refused an offer from Yale University yesterday? — Yeah , but I have no idea ____ he did it ; that's one of his favorite universities.
【单选题】某企业在6年前购置一台机床，原价18 000元，拟报废清理或修理后作价出售，假定报废后得残值1 200元，进行修理则需花费4 000元，修理后作价8 000元，那么( )元是沉没成本。
A.
18 000
B.
1 200
C.
4 000
D.
8 000
【单选题】某企业在6年前购置一台机床,原价18000元,拟报废清理或修理后作价出售,假定报废后得残值1200元,进行修理则花费4000元,修理后作价8000元,那么( )元是沉没成本。
A.
18000
B.
1200
C.
4000
D.
8000
【单选题】阅读理解,请选出合适的答案 2.After walking out of the station, Mike_____. Mike worked in an office in a small town. One day his boss said to him, “Mike,I want you to go to Richmond, to an office there, to see Mr S...
A.
asked an old woman where the office was
B.
went to the office with an old woman
C.
found the office easily
D.
/
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