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举一反三
【单选题】物流流动的六要素是（ ）
A.
流体、载体、流向、流量、流程、流速
B.
车站、码头、火车、轮船、飞机、汽车
C.
铁路、公路、水路、空中航线、港口、机场
D.
包装设备、装卸机械、仓库、托盘、叉车、货物
【单选题】第二篇 Flying the Hypert Skies A little airplane has given new meaning to the term "going hyper. " The Hyper-X recently broke the record for air-breathing jet planes when it traveled at a h...
A.
It indicated the birth of a very fast airplane.
B.
It was self-powered, so it lasted only 11 seconds.
C.
It can transportcargo quickly and cheaply to the brink of space.
D.
It is a major milestone in the journey of a new type of very fast airplanes.
【单选题】Flying the Hypert Skies A little airplane has given new meaning to the term "going hyper. " The Hyper-X recently broke the record for air-breathing jet planes when it traveled at a hypersonic speed o...
A.
It goes slower than a rocket.
B.
It extracts oxygen from the air that flows through the engine.
C.
It works only at speeds greater than five times the speed of sound.
D.
It doesn’t carry its own oxygen supply.
【单选题】下列有关正激波的描述中正确的是( )。
A.
流体力学中，分析正激波内的物理现象可运用连续介质模型
B.
气流通过正激波是等熵压缩过程，总温保持不变
C.
超音速气流经过正激波后速度减小，压强增大
D.
气流通过正激波后熵不变
相关题目：
【单选题】物流流动的六要素是（ ）
A.
流体、载体、流向、流量、流程、流速
B.
车站、码头、火车、轮船、飞机、汽车
C.
铁路、公路、水路、空中航线、港口、机场
D.
包装设备、装卸机械、仓库、托盘、叉车、货物
【多选题】紊流流动的特点包括
A.
无秩序
B.
非稳定流动
C.
存在质点碰撞引起的能量损失
D.
流层结构更为复杂
【单选题】（）类客流流量较大。
A.
病产
B.
旅客
C.
旅游
D.
涉外
【单选题】T-1203塔回流流量低联锁值为（）m3/h
A.
12
B.
15
C.
20
D.
22
【单选题】亚洲多数河流流向的特点是（ ）
A.
自西向东
B.
自北向南
C.
由中间向四周呈放射状
D.
流向没有规律
【判断题】超音速气流的流速一定大于亚音速气流的流速。
A.
正确
B.
错误
【单选题】超音速喷管是一个( )的管道。
A.
先扩张后收敛形
B.
扩张形
C.
收敛形
D.
先收敛后扩张形
【单选题】第二篇 Flying the Hypert Skies A little airplane has given new meaning to the term "going hyper. " The Hyper-X recently broke the record for air-breathing jet planes when it traveled at a h...
A.
It indicated the birth of a very fast airplane.
B.
It was self-powered, so it lasted only 11 seconds.
C.
It can transportcargo quickly and cheaply to the brink of space.
D.
It is a major milestone in the journey of a new type of very fast airplanes.
【判断题】N极下面所有电流流向必须一致
A.
正确
B.
错误
【单选题】我国自主生产的第一代超音速战斗机是____。
A.
歼10
B.
歼8
C.
歼7
D.
歼6
【单选题】超音速气流经过收缩管道后
A.
速度增加,压强增大
B.
速度增加,压强下降
C.
速度降低,压强增大。
【单选题】属于中国的第一代超音速战机的是____?
A.
歼5
B.
歼6
C.
歼7
D.
歼10
【多选题】河流流水形状主要
A.
横向环流
B.
旋涡流
C.
顺流
D.
逆流
【单选题】Flying the Hypert Skies A little airplane has given new meaning to the term "going hyper. " The Hyper-X recently broke the record for air-breathing jet planes when it traveled at a hypersonic speed o...
A.
It goes slower than a rocket.
B.
It extracts oxygen from the air that flows through the engine.
C.
It works only at speeds greater than five times the speed of sound.
D.
It doesn’t carry its own oxygen supply.
【单选题】下列有关正激波的描述中正确的是( )。
A.
流体力学中，分析正激波内的物理现象可运用连续介质模型
B.
气流通过正激波是等熵压缩过程，总温保持不变
C.
超音速气流经过正激波后速度减小，压强增大
D.
气流通过正激波后熵不变