在钢的整体热处理过程中,常用的、进行预备热处理的是( )。
A.正火和淬火 B.正火和回火 C.淬火和回火 D.退火和正火
参考答案:D
It was the third time that she ______ to this mountain village to see the children.
A.had come
B.has come
C.came
D.would come
有以下程序: main() { char a[7]="a0\0a0\0":int i,j i=sizeof(a);j=strlen(a): printf("%d%d\n",i,j); } 程序运行后的输出结果是【 】。
A.22
B.76
C.72
D.62