问题 单项选择题

下列关于基础埋深的正确叙述是()。

A.在满足地基稳定和变形要求前提下,基础应尽量浅埋,当上层地基的承载力大于下层土时,宜利用上层土作持力层。除岩石地基外,基础埋深不宜小于0.6m

B.位于岩石地基上的高层建筑,其基础埋深应满足稳定要求。位于地基上的高层建筑,其基础埋深应满足抗滑要求

C.基础宜埋置在地下水位以上,当必须埋在地下水位以下时,应采取措施使地基土在施工时不受扰动

D.当存在相邻建筑物时,新建建筑物的基础埋深一般大于原有建筑基础

答案

参考答案:B

阅读理解

Wetlands ! Valuable Resources on the Earth

     There are many wetlands in China and some of them have become the world's important wetlands.

The Chinese Yellow Sea Wetlands are among them. They are in Yancheng, Jiangsu Province. They are

home for many different kinds of animals. The world's largest Milu Deer Nature Reserve is in them. More

than 700 Milu deer live freely there. There are not many red-crowned cranes in the world, but every

winter you can see some in the Red-crowned Crane Nature Reserve in the Yellow Sea Wetlands.

     The temperature in the wetlands is usually neither too high nor too low. There is a lot of rain and

sunshine, too. They are really good places for wildlife. Offering (提供) food and home for some special

kinds of animals is not  the only reason why we need to protect wetlands. Wetlands are important

because they also prevent flood. But some people want to change the wetlands to make more space for

farms and less space for wildlife.

Luckily , more and more people are beginning to realize the importance of wetlands and wildlife . Every

year, on February 2nd, many activities are held to tell people more about wetlands.

1. The Chinese Yellow Sea Wetlands are in the _____of China.

A. east      

B. south    

C. west    

D. north

2. Usually the weather in the wetlands is _____

A. hot      

B. pleasant    

C. cold    

D. dry

3. The World Wetlands Day is  on _____

A. April 22      

B. June 25    

C. February 2  

D. March 22

4. We must protect wetlands because _____

A. they are home for wildlife  

B. they can offer food to animals

C. they can prevent flood      

D. all of the above

5. Some people want to change _____ to make more space for farms 

A. lands    

B. world      

C. wildlife    

D. wetlands

选择题