土谷坊施工工序为定线、清基、开挖结合槽、（）、挖溢水口、种植灌草。
A.回填土
B.填土夯实修筑
C.土体压实
D.分层碾压
参考答案：B
— Do you need to get there before ten?
— No, I . [ ]
A. don't have to
B. don't need
C. can't
D. mustn't
点巡检的12个环节是什么？
