Paleontologist Stephen Jay Gould has argued that many biological traits are not the products of natural selection, favored due to their enhancement of reproduction or survival, but that they are simply random by-products of other evolutionary developments.
Paleontologist Stephen Jay Gould has argued that many biological traits are not the products of natural selection, favored due to their enhancement of reproduction or survival, but that they are simply random by-products of other evolutionary developments.
(A) due to their enhancement of reproduction or survival, but that they are
(B) due to the reproduction or survival they enhance, but they are
(C) because they enhance reproduction or survival, but
(D) because they enhance reproduction or survival, but are
(E) because of enhancing reproduction or survival, but are
The answer is D. I know it is a paralle structure concerning "not...but...". why cannot "are" be omitted? "not the products of natural selection, but simply random by-products of other evolutionary developments"不是很平行对称么?
首先搞清楚but are simply random by-products of other evolutionary developments 是在和那个部分在并列,其实他是与because they enhance reproduction or survival 并列的,虽然 they enhance 但是 (they )are。
首先搞清楚but are simply random by-products of other evolutionary developments 是在和那个部分在并列,其实他是与because they enhance reproduction or survival 并列的,虽然 they enhance 但是 (they )are。
这个不是not But 结构,如果是not but 结构的话, because they enhance reproduction or survival 必须是插入语啊,但是 because 后面的加的是一个完整的句子啊,不是插入语结构啊,所以我说they enhance reproduction or survival, but are simply random by-products of other evolutionary developments.是一个完整的句子,如果像你所说的not but 结构,那么的确 are 是不应该加的,they are not A but B。但是你忽略了中间插入的不是插入语,是because的结构。不知道这样讲是不是清楚了~
这个不是not But 结构,如果是not but 结构的话, because they enhance reproduction or survival 必须是插入语啊,但是 because 后面的加的是一个完整的句子啊,不是插入语结构啊,所以我说they enhance reproduction or survival, but are simply random by-products of other evolutionary developments.是一个完整的句子,如果像你所说的not but 结构,那么的确 are 是不应该加的,they are not A but B。但是你忽略了中间插入的不是插入语,是because的结构。不知道这样讲是不是清楚了~