线岔处两支承力索间隙不应小于()。
A、50mm
B、60mm
C、80mm
D、100mm
参考答案:B
You'd better ring up your parents ____ you get there. [ ]
A. when
B. until
C. while
D. as soon as
以下程序段中,不能正确赋字符串(编译时系统会提示错误)的是( )。
A.char s[10]=="abcdefg";
B.char t[]="abcdefg",*s=t;
C.char s[10];s="abcdefg";
D.char s[10];strcpy(s,"abcdefg");