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【单选题】
对于一种可变要素投入的生产函数,所表示的厂商要素投入的合理区域为A.
开始于AP的最大值，终止于TP的最大值
B.
开始于AP与MP相交处，终止于MP等于零
C.
是MP递减的一个阶段
D.
以上都对
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举一反三
【单选题】—On the contrary, I think it is the mother, rather than her children, _________to blame. —I agree with you.
A.
what is
B.
that is
C.
who are
D.
that are
【单选题】—Did you remember to give Marry the money you owed her？ —Yes, I gave it to her _______ I saw her.
A.
while
B.
the moment
C.
suddenly
D.
once
【单选题】- Did you remember to give Mary the money you owed to her? - Yes, I gave it to her_ ____I saw her.
A.
while
B.
uddenly
C.
the moment
D.
once
【简答题】下列选项中,哪一项不是Shell的合法循环结构。A.until do done; B.do until done; C.for do done; D.while do done;
【单选题】听力原文：W: Jane told me she was going to quit her job. I'll certainly be sorry to see her go. M: Oh, she always says that! I wouldn't buy her a going-away present if I were you. What does the man think a...
A.
She will quit her job.
B.
She will be sorry if she quits her job.
C.
She will not quit her job.
D.
She will not accept his present.
【单选题】下列选项中,哪一项不是Shell的合法循环结构。
A.
until do done
B.
do until done
C.
for do done
D.
while do done
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