干砌石多用于()工程.
A、挡土墙
B、护坡
C、堰坝
D、以上三种都适用
参考答案:A
单纯性裂孔性视网膜脱离的手术成功率大约是()
A.90%
B.80%
C.70%
D.65%
E.50%
有以下程序:prt(int *m,int n){int i;for(i=0;iA.1,2,3,4,5, B.2,3,4,5,6, C.3,4,5,6,7, D.2,3,4,5,1,
A.1,2,3,4,5,
B.2,3,4,5,6,
C.3,4,5,6,7,
D.2,3,4,5,1,