257. During an ice age, the buildup of ice at the poles and the drop in water levels near the equator speed up the Earth’s rotation, like a spinning figure skater whose speed increases when her arms are drawn in.
(A) like a spinning figure skater whose speed increases when her arms are drawn in
(B) like the increased speed of a figure skater when her arms are drawn in
(C) like a figure skater who increases speed while spinning with her arms drawn in
(D) just as a spinning figure skater who increases speed by drawing in her arms（E）
(E) just as a spinning figure skater increases speed by drawing in her arms
答案是E, 相比较其他选项，选E没太大问题，其他错误很明显。但就E，我想问：通常不是说as后面只能跟不完整句子吗？但E中as后面是个完整的句子呀？这个怎么解释呢？
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