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  3. The word "paradox"(Para. 1) means "______". We know less about the astronomical universe than we do about any social system bec

The word "paradox"(Para. 1) means "______". We know less about the astronomical universe than we do about any social system bec

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问题 The word "paradox"(Para. 1) means "______".
We know less about the astronomical universe than we do about any social system because ______.
选项 A、theories of its origin and history are varied
B、our knowledge of it is highly insecure
C、only a very. small sample of it has been observed
D、few scientists are involved in the study of astronomy
答案C
解析 本题为细节题。文中提到astronomical universe时说，Records of the astronomical universe，....are limited in the extreme．也就是说，我们在宇宙天文方面可供研究的样本太少了，所以相对社会科学来说，我们所知的就很少。
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