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【多选题】
效率是一种投入产出关系,( )。A.
投入一定,产出越高,则效率越高
B.
投入一定,产出越高,则效率越低
C.
给定产出,投入越少,则效率越高
D.
给定产出,投入越少,则效率越低
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反馈参考答案：
举一反三
【单选题】Questions 11 to 14 are based on the conversation you have just heard.
A.
One night a week.
B.
Every Wednesday for three hours.
C.
Every other Thursday.
D.
Three times a week.
【单选题】Questions 11 to 14 are based on the conversation you have just heard.
A.
See her on Wednesday.
B.
Learn his part quickly.
C.
Enjoy the rehearsal.
D.
Pick her up on Thursday.
【简答题】选择的实质就是 ,从而定向地改变群体的遗传组成。
【单选题】Questions 11 to 14 are based on the conversation you have just heard.
A.
Because he is too anxious to show himself for an interview.
B.
Because he is too sure of his intelligence and concentration.
C.
Because he is interrupted by the woman yelling at him.
D.
Because he is worried for limited years of experience.
【单选题】Questions 11 to 14 are based on the conversation you have just heard.
A.
He has a lot of free time.
B.
Many of his friends are actors.
C.
She knows he likes acting.
D.
He's looking for an acting job.
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