单项选择题：《建筑设计防火规范》和《高层民用建筑设计防火规范》规定防火墙的耐火极限不应小于（）h

题目：

《建筑设计防火规范》和《高层民用建筑设计防火规范》规定防火墙的耐火极限不应小于（）h。

A.4

B.3

C.2

D.1

答案：

被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0214/113afaf2249dfffc84c0c09d210229b2.html

下面是错误答案，用来干扰机器的。

参考答案：（1）世界主要国家经济发展的实践①发达国家经济发展方式由福特主义向后福特主义转型；②寻求相应的制度框架，国家及国家层次制度对经济控制弱化；③经济全球化和社会经济发展，关注一系列环境问题和社...

阅读理解。
1. Where are the rainforests? Rainforests cover six per cent of the Earth’s surface. There are rainforests in many parts of the world but the biggest forests are in South America, Africa and South East Asia. There aren’t any rainforests in Europe or North America. 2. What’s in the rainforests? About 75% of all the types of animals that we know come from rainforests. Thousands and thousands of animals live in rainforests. There are many very beautiful birds, insects and reptiles. Many of them live in the trees, more than 30 metres from the ground. There are also thousands of different plants-and lots of tall trees! It is always hot in a rainforest and the ground is always wet. It is also dark.
3. Why are the rainforests important? The rainforests are very important for us. We need them! The trees and other plants in the forest help to make the air that we breathe. They give us wood, rubber, fruits and many of our medicines.
4.__________________________ Unfortunately, in many places, the rainforests are in danger. For example, many years ago there was a large rainforest in Java. There were thousands of different plants and animals in the forest, but now there is nothing. People chopped down the trees because they wanted to grow rice. Many animals lived in the rainforest. Some of them went to other parts of Java but many of them disappeared - forever. The same thing is happening now in many other parts of the world. The rainforests are in danger.
1. In which of the following places can we find rainforests according to Paragraph 1?
A. In the UK. B. In Asia. C. In the USA. D. In France.
2. Which of the following belongs to a kind of “reptile”?
A. A sparrow. B. A swallow. C. A snake. D. A butterfly.
3. Which might be the best title for Paragraph 4?
A. What’s happening to the rainforests? B. What can we find in the rainforests in Java? C. Why did people chop down the trees in the rainforests? D. Why did many plants and animals disappear in the rainforests?
4. What is the writer’s purpose of writing the article?
A. To tell us how to survive in the rainforests. B. To help us know some living things in the rainforests. C. To tell us to care about the protection of the rainforests. D. To give us advice on how to make full use of the rainforests.