C
大意是說,為了盡可能研究地球、太陽、以及人們在太空中的工作和生活能力,（空間站）技術(shù)被研發(fā)并投入使用
6.In order to be able to study Earth,the sun,and humans'
6.In order to be able to study Earth,the sun,and humans'
ability to live and work in space,_______________
were developed and launched.
a.Saturn V rockets
b.the Mercury spacecraft
c.space stations
d.starships
ability to live and work in space,_______________
were developed and launched.
a.Saturn V rockets
b.the Mercury spacecraft
c.space stations
d.starships
英語人氣：519 ℃時間：2020-09-10 05:24:22
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