What’s the most interesting thing ?[ ]
A. see
B. seeing
C. to see
D. saw
答案:C
同碳数的烃类的折光率比较为()。
A.烯烃>环烷烃>芳香烃>烷烃
B.芳香烃>环烷烃>烯烃>烷烃
C.环烷烃>烯烃>芳香烃>烷烃
D.烷烃>环烷烃>芳香烃>烯烃
吴三桂叛乱以彻底失败而告终。