Nuclear fusion is the force that powers the Sun, the stars, and hydrogen bombs, merging the nuclei of atoms and not splitting them apart, as in nuclear reactors.

(A) merging the nuclei of atoms and not splitting them apart, as in nuclear reactors

(B) merging the nuclei of atoms instead of splitting them apart, like nuclear reactors

(C) merging the nuclei of atoms rather than splitting them apart, as nuclear reactors do

(D) and merges the nuclei of atoms but does not split them apart, as is done in unclear reactors

(E) and merges the nuclei of atoms, unlike atomic reactors that split them apart

答案是E.

搜索了前人的帖子，但是没找到有人问过相关问题，肯能是我太弱了，呵呵。

我搞不清楚and merges 是与谁并列的。如果与主句的is并列那是肯定的错的，与定语从句的谓语powers并列吗？感觉这个也是错的的呀？ 与powers并列不也相当于 句子＋逗号and 谓语吗？与前者的错误是一样的呀。请问什么情况下使用 逗号and 谓语 ？想了好久也没明白，请教！！

我想这里是merges与powers平行. Nuclear fusion is the force that

powers A,B,and C, and merges D...

and merges前加逗号,是因为在powers 和 merges之间有A,B和C将它们隔开.

所以需要加个逗号.如果,没有A,B和C的话,是无须加逗号的.