干砌块石谷坊施工工序有（）、挖结合槽、修筑三个步骤。A.压实 _爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

干砌块石谷坊施工工序有（）、挖结合槽、修筑三个步骤。

A.压实

B.填土

C.清基

D.填筑

答案

参考答案：C

选择题

The news came as no surprise to me . I ____ for some time that the factory was going to shut down .

A．knew

B．know

C．have known

D． had known

问答题

论述五种主要运输方式的概念及其特点。