公路工程施工现场大型预制构件的底座分为平面底座和曲面底座。其_爱下问搜题

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问题单项选择题

公路工程施工现场大型预制构件的底座分为平面底座和曲面底座。其中，曲面底座适用的梁底为( )。

A．等截面箱梁

B．工形梁

C．T形梁

D．曲面的箱形梁

答案

参考答案：D

改错题

短文改错。

My car just wouldn't move any further. It was complete
dead, and I was a few miles far away from anywhere on a cold,
wet night. I decided walk around a little before accepting I'd
have to spend the night in the car. Maybe I can find a
telephone. Actually, he didn't have to walk far before I
found a small house standing on a field with a light
shone from the sitting room. I knocked at the door and
was delighting when a pleasant old man opened the
door but listened to my story carefully. He said he had
no telephone, and it wasn't one within walking distance.
but offered to come and look at my car.

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单项选择题

巷道坡度大于（）时，严禁人力推车。

A、3‰

B、7‰

C、3%

D、7%