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【多选题】
The main branches of aerodynamics include: ____.
A.
Computational aerodynamics
B.
Experimental aerodynamics
C.
Structural aerodynamics
D.
Aerodynamics of prototype’s flight test
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参考解析:
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【单选题】In the holding chamber, the carbon dioxide
A.
changes back to a gas.
B.
dries the dishes
C.
is allowed to cool.
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【单选题】Nowadays computer and computer technology has completed ____ of the work in aircraft design and manufacture.
A.
More than 50%
B.
More than 60%
C.
More than 70%
D.
More than 80%
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【多选题】计量单位组类型包括()。
A.
无换算率
B.
固定换算率
C.
浮动换算率
D.
变动换算率
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【判断题】扭转变形的内力是扭矩。
A.
正确
B.
错误
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【单选题】CFD could be a substitution of wind tunnel tests under ____.
A.
High angle of attack situation
B.
Normal wind tunnel tests
C.
Separate flow situation
D.
Complex flowing control situation
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【单选题】At the end of the cleaning process, the carbon dioxide
A.
is released into the air.
B.
is disposed of with the waste.
C.
is collected ready to be re-used.
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【单选题】下列与杆件扭转变形内力有关的是( )。
A.
横截面尺寸
B.
剪切弹性模量
C.
外力偶矩
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【多选题】The main stages in aerodynamic design method and process of aircraft include: ____.
A.
The investigation and demonstration
B.
The concept and preliminary design
C.
The wind tunnel test and verification
D.
The flight tests
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【判断题】其它条件不变时,传动轴的功率越大,它所提供的力偶矩越大。
A.
正确
B.
错误
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【判断题】在设置计量单位时,必须先设置计量单位组,再在组下增加具体的计量单位。
A.
正确
B.
错误
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