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【单选题】
The civil turbofan engine with good performance now has a bypass ratio nears ____.
A.
6
B.
8
C.
10
D.
12
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【多选题】The turbofan engines used on military aircraft have characteristics as: ____.
A.
Low bypass ratio
B.
High bypass ratio
C.
Have afterburner
D.
The engine is featured inside the airframe
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【判断题】等直圆杆两端固定,在靠近左端的某位置作用扭转力偶矩,则支反力偶矩左端大于右端。
A.
正确
B.
错误
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【多选题】在用友财务系统中,凭证类别的限制类型有( )。
A.
借方必有
B.
贷方必有
C.
贷方必无
D.
借方必无
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【单选题】Which of the follow aircraft's engine equipped with thrust vectoring technology? ____.
A.
First generation
B.
Second generation
C.
Third generation
D.
Fourth generation
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【判断题】等直圆杆和套筒组成的组合杆两端固定在平板上,当一端平板相对另一端平板转动时,该问题属于一次超静定问题。
A.
正确
B.
错误
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【单选题】There is a wider range of chievement amongst English pupils studying maths than amongst their Japanese counterparts.
A.
YES
B.
NO
C.
NOT GIVEN
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【判断题】业务量较少的单位,可以不进行凭证分类设置,既只设置记账凭证一种类型。 ( )
A.
正确
B.
错误
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【判断题】等直圆杆两端固定,在杆上某处作用扭转力偶矩,这是一次超静定问题。
A.
正确
B.
错误
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【多选题】Nozzles that capable of implementing thrust vectoring technology includes: ____.
A.
Binary thrust vectoring nozzle
B.
Axisymmetric thrust vectoring nozzle
C.
Adopts baffle behind the nozzle
D.
Steerable vertical take-off and landing nozzle
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【单选题】The thrust generated by propellers of turboprop engines took ____ of the total thrust.
A.
10%
B.
50%
C.
75%
D.
90%
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