题目

 I’d prefer to stay at home _____ to see the film.   A. than go     B. rather than go   C. than going   D. than to go 答案：B常见prefer的结构：1) prefer sth /doing sth to sth /doing sth；2) prefer to do sth rather than do sth。一条多肽链含120个氨基酸。控制合成它的mRNA和DNA分子中，至少各应含有的碱基数目分别是 [　　] A．360、360B．360、720 C．120、360D．120、240