题目内容

What does NASA plan to do？查看材料

A. To build one more Hyper-X aircraft.
B. To carry out three more Hyper-X experiments.
C. To make the aircraft fly higher and longer.
D. To test another hypersonic flight at 10 times the speed of sound.

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快速性(名词解释)

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采样开关(名词解释)

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政策执行的过程模型的提出者是

A. 史密斯
B. 霍恩和米特尔
C. 雷恩和拉宾诺维茨
D. 梅兹曼尼安和萨巴蒂尔模型

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What kind of engine did the Hyper-X use？查看材料

A jet engine that carries its own oxygen supply.
B. A jet engine that uses no oxygen.
C. A scramjet engine that doesn"t carry its own oxygen supply.
D. A rocket engine that carries its own oxygen supply.

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What does NASA plan to do？ 查看材料

A. To build one more Hyper-X aircraft. B. To carry out three more Hyper-X experiments. C. To make the aircraft fly higher and longer. D. To test another hypersonic flight at 10 times the speed of sound.

快速性(名词解释)

采样开关(名词解释)

政策执行的过程模型的提出者是

What kind of engine did the Hyper-X use？ 查看材料

What does NASA plan to do？查看材料

A. To build one more Hyper-X aircraft.
B. To carry out three more Hyper-X experiments.
C. To make the aircraft fly higher and longer.
D. To test another hypersonic flight at 10 times the speed of sound.

What kind of engine did the Hyper-X use？查看材料