104. 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C, 但 C 里as nuclear reactors do 的 do 是指前面的哪个动词？ 是指powers 还是 splitting? 以什么根据判断do 的修饰动词呢？ | 
