在刚性基础设计时，通常要使基础大放脚与基础材料的刚性角一致，_爱下问搜题

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问题单项选择题

在刚性基础设计时，通常要使基础大放脚与基础材料的刚性角一致，其目的是（）。

A．提高地基的承载能力

B．加大基底接触面积

C．节约基础材料

D．限制基础材料刚性角的增大

答案

参考答案：C

解析：

根据材料受力的特点，不同材料构成的基础，其传递压力的角度也不相同。刚性基础中压力分布角α称为刚性角。在设计中，应尽量使基础大放脚与基础材料的刚性角一致，以确保基础底面不产生拉力，最大限度地节约基础材料。

阅读理解

Anna lived on the side of a valley. One winter, there was a very big flood, and a lot of houses       Anna's were washed away. Anna's house was high enough to escape the flood, so when the water had disappeared and the other houses were       there with no roof and no walls and all covered with mud(泥) , her house was       quite all right.
Her house was quite small, her husband was dead, and she had four children ,      Anna took in one of the families that had lost         in the flood and she       her home with them until it was        for them to rebuild their houses.
Anna's friends were puzzled （迷惑的）when they saw Anna do this. They could not understand why Anna wanted to give       so much more work and trouble when she already had quite a few children to support .
"Well," Anna       her friends, "at the end of the First World War, a woman in the town where I later lived found herself very poor, because her husband         in the war and she had a lot of children,        I have now. The day before Christmas, this woman said to her children, ‘We won’t be able to have much for         this year, so I’m going to         only one present for all of us. Now I’ll go and get it.’ She came back         a girl who was even poorer than they, and who had no parents. ‘Here’s our present, ’ she said to her children. The children were happy to get such a present. They welcomed the little girl, and she grew up as their sister.         was that Christmas present.”

B．just around

A．explained to

C．talked with

B．might be killed

C．had been killed

B．your birthday

单项选择题

腹部最易受损的内脏是（）。

A.肝脏

B.十二指肠

C.横结肠

D.脾

E.肾脏