突起路标的耐压性能测定时，要求突起路标的耐压荷载不低于（）方_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

突起路标的耐压性能测定时，要求突起路标的耐压荷载不低于（）方为合格。

A、140kN

B、150kN

C、160kN

D、200kN

答案

参考答案：C

填空题

选词填空。

how, to, by, on, near, go, get, stop, at, wait

1. My home is              the post office.
2.             do you go to school?  I go to school              foot.
3. Look              the traffic lights.
4. How do your parents              to work?
5. My father often goes              Canada by plane.
6.              at a red light.
7. John usually goes to school              bike.
8. How can I             to People's Park?
9. Yellow light means "              ".

单项选择题

煤矿安全监控系统对井下电源电压波动的适应范围应在（）。

A、90%～110%

B、85%～110%

C、75%～110%