为保证检查桥梁支座的安全，所有钢梁圬工梁应在墩台顶设围栏、吊_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题判断题

为保证检查桥梁支座的安全，所有钢梁圬工梁应在墩台顶设围栏、吊篮。

答案

参考答案：错

选择题

—I heard your father ______ to Canada.
—Yes, he ______ there last year.

A. went; went
B. had been; went
C. had gone; went
D. had been; has gone

单项选择题

肺病的典型症状是

A．气短

B．神疲

C．咳嗽

D．胸闷

E．痰饮