函数f(x，y)=x3-3x-y在点(1，0)处( )
A. 有极大值
B. 有极小值
C. 无极值
D. 无法判断
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合同对于履行地点约定不明确的，给付货币的，应当在什么地点履行( )
A. 债权人所在地
B. 债务人所在地
C. 标的物所在地
D. 履行义务人所在地
膨胀土具有一定的胀缩性，根据自由膨胀率指标δef可确定是否为膨胀土。当δef为下列( )范围时，即可定为膨胀土。
A. δef＜20%
B. 20%≤δef＜30%
C. 30%≤δef＜40%
D. δef≥40%
The woman believes that Yoshida should be given more support because
A. women are not accepted in the department.
B. women are not as strong as men.
C. Yoshida will find herself in a difficult position if she becomes department head.
D. except them no one will trust her and believe her.
Why does the first man regard it is nice to nominate a woman
A. Women have had trouble for a long time.
B. Women are more qualified than men in this position.
C. Women are better in handling people.
D. Women are more likely to be accepted by others.
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