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【单选题】
边际收益递减规律的适用条件是( )。A.
生产技术没有发生重大变化
B.
总产量一直减少
C.
总产量一直增加
D.
生产技术发生重大变化
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皮皮学刷刷变学霸
举一反三
【单选题】Since he lost his job ______.
A.
dozens of people have rung him but haven't given him a job
B.
he has applied for jobs but nobody ever replies to his letters
C.
he has not seen any other jobs advertised
D.
only four times have employers asked him to come and see them
【单选题】A rogue called hacker could take control of the entire system by implanting his own instructions in the software and then he could program the computer to erase any sign with which he was never there.
A.
of his having ever been there
B.
he ever has been there
C.
of his being ever there
D.
of nobody having ever been there
【简答题】国家规定的安全色是指哪几种颜色？
【单选题】—You look so happy! —Jack says I am pretty.________ has ever told me that before. [ ]
A.
Somebody
B.
Anybody
C.
Everybody
D.
Nobody
【简答题】国家规定的安全色是哪几种颜色?
【单选题】Nobody ever has any to hurt your feeling.
A.
intention
B.
heart
C.
purpose
D.
thought
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