需用堤确定正中位关系及垂直距离的是（）。 A．上颌缺失 B．上颌，下颌缺失 C．上额

一块三角形菜地的底是100米，高是底的1.5倍．如果每公顷菜地能收获25吨白菜，这块菜地一共可收获多少吨白菜？

根据首字母提示写出单词

1. Any helpful s_______ would be welcome.

2. Are you all c_______ now about what you have to do?

3. The r______ of the game are quite simple.

4. She is a tour guide, so she always 1_______ the way while visiting the Science Museum.

5. It's one o'clock now. You must be s_______! Could I get you something to eat?

桥梁施工时，插点可采用（）法。

A、前方交会

B、侧方交会

C、后方交会

D、上述全对

如何对地板进行装修验收？

直接测量