题目内容

单开道岔水平检查除普通尖轨跟端轨面较基本轨高出（）mm导曲线设超高外，其余均应在同一水平面上。

A. 5
B. 6
C. 7
D. 8

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导曲线下股高于上股的限值：作业验收为0，经常保养为（），临时补修为3mm。

She expects to defend her ( ) successfully in the next Olympics.

A. tournament
B. title
C. prize
D. personality

"It's OK now," the man said to his family when they were finally ( ) of danger.

A. in
B. into
C. out
D. from

This is really something to be proud ().

A. out
B. at
C. of
D. in