Questions 39-40 Choose TWO letters A-E. The TWO main purposes of the writer of this text are to explain A the reasons why space

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问题 Questions 39-40 Choose TWO letters A-E.
The TWO main purposes of the writer of this text are to explain
A the reasons why space archaeology is not possible.
B the dangers that could follow from contamination of objects from space.
C the need to set up careful controls over space tourism.
D the need to preserve historic sites and objects in space.
E the possible cultural effects of space travel.

选项

答案D

解析
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