拱圈浇筑混凝土应()
A、由拱顶向拱脚进行
B、由拱脚向拱顶进行
C、两侧对称进行
D、两侧分别先后错开进行
参考答案:B, C
You'd better keep us ______of any change of the address as soon as possible. [ ]
A. informed
B. informing
C. inform
D. toinform
推进农村改革发展的指导方针是什么?