防水型隧道纵向盲管分段长度不应大于（），并直接与侧沟连通。
参考答案：30m
— The skirt looks very nice. May I _____?
— Yes, please. [ ]
A. try it on
B. try them on
C. try on it
D. try on them
大定风珠的君药是
A.阿胶
B.龟板
C.白芍
D.鳖甲
E.鸡子黄
