题目

26. She is very diligent. She often studies _____ into the night. A. deeply                 B. deep                     C. farther                      D. Later 答案：B下列说法正确的是(    ) A.碳碳间以单键结合，碳原子剩余价键全部与氢原子结合的烃一定是饱和链烃 B.分子组成符合CnH2n+2的烃一定是烷烃 C.正戊烷分子中所有的碳原子均在同一条直线上 D.碳、氢原子个数比为1∶3的烃有两种