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The first animals on this living sphere, the Earth, were primitive______animals, and then around 500 million years ago these sea
The first animals on this living sphere, the Earth, were primitive______animals, and then around 500 million years ago these sea
admin
2013-02-16
68
问题
The first animals on this living sphere, the Earth, were primitive______animals, and then around 500 million years ago these sea animals developed shells.
选项
A、versatile
B、marine
C、redatory
D、feasible
答案
B
解析
句子大意为:地球上的首批动物是原始海洋动物,然后在大约500万年前这些海洋动物进化出了身上的壳儿状物。句子后半句提到“这些海洋动物”,可知空中应该也是同样意思,四个选项中只有选项B是“海洋的”之意。
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