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题目内容
（英语（专升本））
2.All US commercial space cargo will in the future have to fly on ________. (NASA’s New Plans for Space Shuttle Launches)
A)military rockets
B)NASA space shuttles
C)private industries’ rockets
D)rockets of foreign countries
A)military rockets
B)NASA space shuttles
C)private industries’ rockets
D)rockets of foreign countries
参考答案