超音速气精经过正激波后,可能是亚音速气流,也可能是超音速气流-刷刷题APP

【简答题】阅读理解 We often think of future. We often wonder what the world will be like in a hundred years' time.Think of space,perhaps a permanent (永久的) station on the moon will have been set up. Perhaps people w...

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【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

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【简答题】Science and Technology There is a difference between science and technology. 1 Science has to do with discovering the facts and relationships between observable phenomena in nature and with establ...

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【简答题】以下是超音速运输机的是？

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【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 making a new type of very fast airplanes.

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【单选题】A319飞机是双发单通道亚音速中短程的飞机。

A.

是

B.

否

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【简答题】超音速气流流过激波后,气流的

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【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

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【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

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【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

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