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In ancient times, some catastrophic extinction of species occurred______.
In ancient times, some catastrophic extinction of species occurred______.
admin
2012-06-18
103
问题
In ancient times, some catastrophic extinction of species occurred______.
选项
A、sequentially
B、repeatedly
C、naturally
D、intentionally
答案
C
解析
C选项naturally的意思是“自然地”;A选项sequentially的意思是“相继地,连续地”;B选项repeatedly的意思是“反复地”;D选项intentionally的意思是“故意地”。本题意为“在古代,一些灾难性的物种灭绝自然地发生”。
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考博英语
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