在第四段中，作者认为水是生命所必需的。
In the fourth paragraph, the writer thinks that water is necessary for life.
在第四段中，提到七次“光”，在第二和第三段中提到七次“水”。
There are seven references to "light" in the fourth Hebrew paragraph, seven references to water in second and third paragraphs.
第四段中间说明在两个不同的板块不可能有同样的动植物。
D. The same animals and plants developed at the same time in two different places.
第四段中间说明在两个不同的板块不可能有同样的动植物。
D. The same animals and plants developed at the same time in two different places.
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