隧道门端墙的砌筑与回填应两侧（）进行，不得对衬砌产生偏压。
A.分开
B.同时
C.对称
参考答案：C
求满足下列条件的直线方程过定点P(2,3)且在两坐标轴上的截距相等
----What are you ________?
---My new book . Please help me find them.
A．working with
B．talking about
C．looking for
D．look like
