枇杷叶的主要化学成分是()
A.蒽醌类
B.生物碱类
C.皂苷类
D.香豆素类
E.黄酮类
参考答案:C
People are talking about the new traffic regulations _______in two months.
A.to be put on
B.to put on
C.being put on
D.put on
有以下程序: #include<string.h> main() char p[20]='a','d','c','d',q[]="abc",r[]="abcde" strcat(p,r);strcpy(p+strlen(q),q); printf("%d\n",sizeof(p)); 程序运行后的输出结果是______。