友矩阵(名词解释)

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.

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