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【简答题】
在推导水之类的流体层流时圆直管内的速度分布式时，首先需要在管轴线处取一圆柱进行受力分析，写出受力平衡方程，然后需要将表示圆柱壁面处的摩擦应力用（）定律的表达式代入，再行积分，可以得到速度的分布式为：【图片】
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参考答案：
举一反三
【单选题】( )又称种孔,是珠孔的遗迹,位置正对着胚根的尖端,种子萌发时胚根由此伸出。
A.
种脐
B.
发芽口
C.
脐条
D.
内脐
E.
种阜
查看完整题目与答案
【简答题】完形填空。 'China will draw a lesson from the recent milk scandal and seize the opportunity that has presented to inspect food safety controls 1 and 2 better business ethics.' Speaking at a luncheon held i...
查看完整题目与答案
【单选题】After the scandal, who has become popular on TV?
A.
Nick and Talia
B.
Dean and Jackie
C.
Jackie and Talia
查看完整题目与答案
【简答题】There has never been a breath of scandal about her.
查看完整题目与答案
【单选题】After the train crash, the station was a ________ of absolute panic. [      ]
A.
scenery
B.
scene
C.
sighting
D.
sign
查看完整题目与答案
【单选题】Doctors and medical supplies to the scene of the accident after the train crash.
A.
had been rushed
B.
were rushed
C.
were rushing
D.
rushed
查看完整题目与答案
【单选题】The scandal has public outrage.
A.
staged
B.
stalked
C.
stored
D.
stoked
查看完整题目与答案
【单选题】Conan Doyle's short story 'A Scandal in Bohemia' has proved to be ______ at last.
A.
successful
B.
powerful
C.
ridiculous
D.
frustrating
查看完整题目与答案
【单选题】It is not  _____ that Sanlu has been connected to a scandal involving milk powder, according to China Daily.
A.
for the first time
B.
the first time
C.
first time
D.
in the first time
查看完整题目与答案
【单选题】The scandal has a bad effect _____his career.
A.
on
B.
of
C.
in
D.
at
查看完整题目与答案
相关题目：
【单选题】( )又称种孔,是珠孔的遗迹,位置正对着胚根的尖端,种子萌发时胚根由此伸出。
A.
种脐
B.
发芽口
C.
脐条
D.
内脐
E.
种阜
查看完整题目与答案
【简答题】完形填空。 'China will draw a lesson from the recent milk scandal and seize the opportunity that has presented to inspect food safety controls 1 and 2 better business ethics.' Speaking at a luncheon held i...
查看完整题目与答案
【单选题】After the scandal, who has become popular on TV?
A.
Nick and Talia
B.
Dean and Jackie
C.
Jackie and Talia
查看完整题目与答案
【简答题】There has never been a breath of scandal about her.
查看完整题目与答案
【单选题】After the train crash, the station was a ________ of absolute panic. [      ]
A.
scenery
B.
scene
C.
sighting
D.
sign
查看完整题目与答案
【单选题】Doctors and medical supplies to the scene of the accident after the train crash.
A.
had been rushed
B.
were rushed
C.
were rushing
D.
rushed
查看完整题目与答案
【单选题】The scandal has public outrage.
A.
staged
B.
stalked
C.
stored
D.
stoked
查看完整题目与答案
【单选题】Conan Doyle's short story 'A Scandal in Bohemia' has proved to be ______ at last.
A.
successful
B.
powerful
C.
ridiculous
D.
frustrating
查看完整题目与答案
【单选题】It is not  _____ that Sanlu has been connected to a scandal involving milk powder, according to China Daily.
A.
for the first time
B.
the first time
C.
first time
D.
in the first time
查看完整题目与答案
【单选题】The scandal has a bad effect _____his career.
A.
on
B.
of
C.
in
D.
at
查看完整题目与答案
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