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【单选题】
尖轨、可动心轨顶面宽50mm及以上断面处，尖轨顶面高于基本轨顶面、可动心轨顶面高于翼轨顶面（）时，应及时修理或更换。
A.
1mm
B.
2mm
C.
3mm
D.
2mm及以上
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举一反三
【判断题】《豳风·东山》的创作时期是周初
A.
正确
B.
错误
查看完整题目与答案
【单选题】The amount of lift can be increased by increasing the following parameters except .
A.
angle of attack
B.
critical angle of attack
C.
surface area of the airfoil
D.
velocity of the air
查看完整题目与答案
【单选题】a symmetrical airfoil is designed with an equal amount of above and below the chord line.
A.
pressure
B.
lift
C.
camber
D.
angle
查看完整题目与答案
【单选题】The designers of an airraft have set up the maximum weight, based on the amount of ____ the wings or rotors can provide under operation conditions for which the aircraft is designed.
A.
weight
B.
lift
C.
thrust
D.
drag
查看完整题目与答案
【单选题】What conclusion can be drawn from the passage?
A.
Richard Bove and Doug Elliott must be opponents in their real life.
B.
The treasury officials had made a big mistake to lift up the amount of capital banks are required to hold in reserve.
C.
Banks will raise the loan price by 4% if they are required to raise the amount of capital reserves.
D.
The economy recession is likely to last for several years in the country.
查看完整题目与答案
【单选题】词汇与结构 The maximum weight of an aircraft is based on the amount of ______ the wings can provide.
A.
drag
B.
lift
C.
weight
D.
thrust
查看完整题目与答案
【简答题】“冷清”、“热闹”、“洁白”等是形容词，能受程度副词的修饰，例如“十分冷清，很冷清”、“特别热闹，非常热闹”、“很洁白，特别洁白”；“雪白”、“笔直”、“冰凉”、“深绿”、“金黄”、“浅红”、“白茫茫”、“金灿灿”、“绿油油”等也都是形容词，但却不能受程度副词的修饰，为什么?
查看完整题目与答案
【单选题】The ____ are plates fitted to upper surface of the wing and creating an increased amount of drag together with a decreased amount of lift.
A.
ailerons
B.
slats
C.
trim tabs
D.
spoilers
查看完整题目与答案
【单选题】设有三个作业J1、J2、J3,其运行时间分别是2、5、3。假定他们同时到达,并在同一台处理器上以单道方式运行,则平均周转时间最小的执行顺序是( )。
A.
J1, J2, J3
B.
J3, J2, J1
C.
J2, J1, J3
D.
J1, J3, J2
查看完整题目与答案
【单选题】is a common factor in airline accidents and a small amount of icing or coarse frost can greatly impair the ability of a wing to develop adequate lift.
A.
Windshear
B.
Icing
C.
Lightning
D.
Turbulence
查看完整题目与答案
相关题目：
【判断题】《豳风·东山》的创作时期是周初
A.
正确
B.
错误
查看完整题目与答案
【单选题】The amount of lift can be increased by increasing the following parameters except .
A.
angle of attack
B.
critical angle of attack
C.
surface area of the airfoil
D.
velocity of the air
查看完整题目与答案
【单选题】a symmetrical airfoil is designed with an equal amount of above and below the chord line.
A.
pressure
B.
lift
C.
camber
D.
angle
查看完整题目与答案
【单选题】The designers of an airraft have set up the maximum weight, based on the amount of ____ the wings or rotors can provide under operation conditions for which the aircraft is designed.
A.
weight
B.
lift
C.
thrust
D.
drag
查看完整题目与答案
【单选题】What conclusion can be drawn from the passage?
A.
Richard Bove and Doug Elliott must be opponents in their real life.
B.
The treasury officials had made a big mistake to lift up the amount of capital banks are required to hold in reserve.
C.
Banks will raise the loan price by 4% if they are required to raise the amount of capital reserves.
D.
The economy recession is likely to last for several years in the country.
查看完整题目与答案
【单选题】词汇与结构 The maximum weight of an aircraft is based on the amount of ______ the wings can provide.
A.
drag
B.
lift
C.
weight
D.
thrust
查看完整题目与答案
【简答题】“冷清”、“热闹”、“洁白”等是形容词，能受程度副词的修饰，例如“十分冷清，很冷清”、“特别热闹，非常热闹”、“很洁白，特别洁白”；“雪白”、“笔直”、“冰凉”、“深绿”、“金黄”、“浅红”、“白茫茫”、“金灿灿”、“绿油油”等也都是形容词，但却不能受程度副词的修饰，为什么?
查看完整题目与答案
【单选题】The ____ are plates fitted to upper surface of the wing and creating an increased amount of drag together with a decreased amount of lift.
A.
ailerons
B.
slats
C.
trim tabs
D.
spoilers
查看完整题目与答案
【单选题】设有三个作业J1、J2、J3,其运行时间分别是2、5、3。假定他们同时到达,并在同一台处理器上以单道方式运行,则平均周转时间最小的执行顺序是( )。
A.
J1, J2, J3
B.
J3, J2, J1
C.
J2, J1, J3
D.
J1, J3, J2
查看完整题目与答案
【单选题】is a common factor in airline accidents and a small amount of icing or coarse frost can greatly impair the ability of a wing to develop adequate lift.
A.
Windshear
B.
Icing
C.
Lightning
D.
Turbulence
查看完整题目与答案