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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
题目标签:超音速速战中国
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参考答案:
参考解析:
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刷刷题刷刷变学霸
举一反三

【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 making a new type of very fast airplanes.

【单选题】中国居民平衡膳食宝塔的最顶层是

A.
肉、禽、鱼、蛋类
B.
蔬菜和水果类
C.
乳类和豆类
D.
油脂和盐
E.
谷类及薯类

【单选题】( )对于中国相当于首饰对于( )

A.
国家——项链
B.
戒指——耳环
C.
美国——英国
D.
人——动物