高速铁路遮板、栏杆等在梁的活动端处均应断开或在()处设伸缩缝,间隙满足伸缩要求。
参考答案:梁缝
当双速梯上行爬行过长,下行冲过平层,则上行应调节_,下行应调节_。
My mother can play computer games but my father _____ . [ ]
A. isn't
B. doesn't
C. aren't
D. can't