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在毛细饱和区,孔隙水压力为 。
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【单选题】一批产品100件，有80件正品,20件次品，其中甲生产的为60件，有50件正品，10件次品，余下的40件均由乙生产。现从该批产品中任取一件，记A=“正品”，B=“甲生产的产品”则P(B|A)=()
A.
0.625
B.
0.562
C.
0.458
D.
0.83
查看完整题目与答案
【单选题】以下说法中错误的是( )[中]
A.
金属材料的强度越高,抵抗变形和断裂的能力越强
B.
拉伸强度实验中,当拉伸力达到屈服点后保持不变时,试样仍能继续伸长
C.
常见金属材料判断塑性的指标为伸长率与断面收缩率
D.
加工零件的表面粗糙度值越高,则疲劳强度越大
查看完整题目与答案
【单选题】－When will the expert come and give the lecture on economic development －Not until our program ____by the government
A.
approves
B.
is to approve
C.
will be approved
D.
has been approved
查看完整题目与答案
【判断题】金属材料的断后伸长率和断面收缩率越大,则此材料的塑性越好
A.
正确
B.
错误
查看完整题目与答案
【单选题】以下说法中错误的是( )
A.
金属材料的强度越高，抵抗变形和断裂的能力越强
B.
拉伸强度实验中，当拉伸力达到屈服点后保持不变时，试样仍能继续伸长
C.
常见金属材料判断塑性的指标为伸长率与断面收缩率
D.
加工零件的表面粗糙度值越高，则疲劳强度越大
查看完整题目与答案
【单选题】以下说法中错误的是( )。
A.
金属材料的强度越向,抵抗变形和断裂的能力越强
B.
拉伸强度实验中,当拉伸力达到屈服点后保持不变时,试样仍能继实伸长
C.
常见金属材料判断塑性的指标为伸长率与断面收缩率
D.
加I零件的表面粗精度值越高,则披劳强度越大
查看完整题目与答案
【单选题】Woodrow Wilson was referring to the liberal idea of the economic market when he said that the free enterprise system is the most efficient economic system. Maximum freedom means maximum productiveness...
A.
criticize the inflexibility.of American economic mythology
B.
contrast 'Old World' and 'New World' economic ideologies
C.
challenge the integrity of traditional political leaders
D.
champion those Americans whom the author deems to be neglected
查看完整题目与答案
【单选题】— When will the expert come and give the lecture on economic development? — Not until our program ____ by the authorities. [     ]
A.
approves
B.
is to approve
C.
has been approved
D.
will be approved
查看完整题目与答案
【单选题】以下说法中错误的是( )。
A.
金属材料的强度越高，抵抗变形和断裂的能力越强
B.
拉伸强度实验中，当拉伸力达到屈服点后保持不变时，式样仍能继续伸长
C.
常见金属材料判断塑性的指标为伸长率与断面收缩率
D.
加工零件的表面粗糙度值越高，则疲劳强度越大
查看完整题目与答案
【单选题】Woodrow Wilson was referring to the liberal idea of the economic market when he said that the free enterprise system is the most efficient economic system. Maximum freedom means maximum productiveness...
A.
The absence of a status quo ante has undermined United States economic structure.
B.
The free enterprise system has been only a useless concept in the United States.
C.
The myth of the American free enterprise system is seriously flawed.
D.
Fascination with the ideal of 'openness' has made Americans a progressive people.
查看完整题目与答案
相关题目：
【单选题】一批产品100件，有80件正品,20件次品，其中甲生产的为60件，有50件正品，10件次品，余下的40件均由乙生产。现从该批产品中任取一件，记A=“正品”，B=“甲生产的产品”则P(B|A)=()
A.
0.625
B.
0.562
C.
0.458
D.
0.83
查看完整题目与答案
【单选题】以下说法中错误的是( )[中]
A.
金属材料的强度越高,抵抗变形和断裂的能力越强
B.
拉伸强度实验中,当拉伸力达到屈服点后保持不变时,试样仍能继续伸长
C.
常见金属材料判断塑性的指标为伸长率与断面收缩率
D.
加工零件的表面粗糙度值越高,则疲劳强度越大
查看完整题目与答案
【单选题】－When will the expert come and give the lecture on economic development －Not until our program ____by the government
A.
approves
B.
is to approve
C.
will be approved
D.
has been approved
查看完整题目与答案
【判断题】金属材料的断后伸长率和断面收缩率越大,则此材料的塑性越好
A.
正确
B.
错误
查看完整题目与答案
【单选题】以下说法中错误的是( )
A.
金属材料的强度越高，抵抗变形和断裂的能力越强
B.
拉伸强度实验中，当拉伸力达到屈服点后保持不变时，试样仍能继续伸长
C.
常见金属材料判断塑性的指标为伸长率与断面收缩率
D.
加工零件的表面粗糙度值越高，则疲劳强度越大
查看完整题目与答案
【单选题】以下说法中错误的是( )。
A.
金属材料的强度越向,抵抗变形和断裂的能力越强
B.
拉伸强度实验中,当拉伸力达到屈服点后保持不变时,试样仍能继实伸长
C.
常见金属材料判断塑性的指标为伸长率与断面收缩率
D.
加I零件的表面粗精度值越高,则披劳强度越大
查看完整题目与答案
【单选题】Woodrow Wilson was referring to the liberal idea of the economic market when he said that the free enterprise system is the most efficient economic system. Maximum freedom means maximum productiveness...
A.
criticize the inflexibility.of American economic mythology
B.
contrast 'Old World' and 'New World' economic ideologies
C.
challenge the integrity of traditional political leaders
D.
champion those Americans whom the author deems to be neglected
查看完整题目与答案
【单选题】— When will the expert come and give the lecture on economic development? — Not until our program ____ by the authorities. [     ]
A.
approves
B.
is to approve
C.
has been approved
D.
will be approved
查看完整题目与答案
【单选题】以下说法中错误的是( )。
A.
金属材料的强度越高，抵抗变形和断裂的能力越强
B.
拉伸强度实验中，当拉伸力达到屈服点后保持不变时，式样仍能继续伸长
C.
常见金属材料判断塑性的指标为伸长率与断面收缩率
D.
加工零件的表面粗糙度值越高，则疲劳强度越大
查看完整题目与答案
【单选题】Woodrow Wilson was referring to the liberal idea of the economic market when he said that the free enterprise system is the most efficient economic system. Maximum freedom means maximum productiveness...
A.
The absence of a status quo ante has undermined United States economic structure.
B.
The free enterprise system has been only a useless concept in the United States.
C.
The myth of the American free enterprise system is seriously flawed.
D.
Fascination with the ideal of 'openness' has made Americans a progressive people.
查看完整题目与答案