与老化前相比较,沥青老化后,其针入度指数将()。
A.变大
B.变小
C.不变
D.因沥青而异
参考答案:A
He likes painting. He is going to be a(n) ______ when he is older. [ ]
A. programmer
B. pilot
C. engineer
D. artist
简述散打竞赛中的有关规定。