主副井错开施工的时间应根据最优网络图而定,一般为()。
A.1~4个星期
B.1~4个月
C.2~4个月
D.3~6个月
参考答案:B
—Miss Wang,I feel very nervous with the competition approaching.
—________. As long as you can finish it,it is a victory.
A.Take your time
B.Take it easy
C.No problem
D.It’s hard to say
直肠癌最多见于
A.直肠与乙状结肠交界处
B.直肠壶腹部
C.腹膜反折平面以上的直肠内
D.齿状线附近
E.直肠上1/3