当路基范围内地下水位较高，施工时应设置（）等排水设施。
A.排水沟
B.边沟
C.渗井
D.检查井
参考答案：A, C, D
—Why didn’t you attend the lecture yesterday?
—I didn’t think that we _______ on Sundays.
A．should
B．ought to have
C．shouldn’t have
D．will have to
冷凝液精制装置换热器采用（）。
A、列管式换热器
B、板式换热器
C、翅片式换热器
D、浮头式换热器
—Why didn’t you attend the lecture yesterday?