题目

下图为不同生物体内葡萄糖分解代谢过程的图解，请据图回答下列问题。（1）有氧呼吸的过程可表示为________，发生在________，产生[H]最多的过程是________。（用图中标号表示）（2）图中产生的H218O含有放射性，其放射性来自反应物中的________，图中过程①进行的场所为________。（3）苹果储存久了，会闻到酒味，是因为苹果细胞进行了________（用图中标号表示）反应；人在剧烈运动后感到肌肉酸痛，是因为人的骨肌细胞进行了________（用图中标号表示）1. Where are rainforests?Rainforests cover six percent of the earth's surface. There are many rainforests in the world but the biggest rainforests are in South America,Africa and Southeast Asia. There aren't any rainforests in Europe or North America.2. What's in rainforests?About 3/4 of all the types of animals come from rainforests. Thousands and thousands of animals live in rainforests. There are many beautiful birds，insects and reptiles(爬行动物).Many of them live in the trees，more than 30 meters from the ground. There are also lots of tall trees and other different kinds of plants！ It is always hot in rainforests and the ground is  always wet. It is also dark.3. Why are rainforests important? Rainforests are very important to us. We need them！The trees and other plants in the forests help to make the air fresh. Rainforests also give us wood, rubber, fruit,medicine and many other things.4.___________________ Unfortunately, in many places, rainforests are in danger. For example, many years ago there was a lai^e rainforest in Java. There were thousands of different plants and animals in the forest, but now there is nothing. People cut down the trees because they wanted to grow rice. Many animals used to live in the rainforest. Then some of them went to other parts of Java and many of them disappeared forever. The same thing is happening now in many other parts of the world. Rainforests are in danger.阅读短文，选择最佳选项。(   ) 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 is TRUE about rainforests?A.  3/4 of all the types of plants come from rainforests.B.   All animals live over 13 meters from the ground.C.   Hie ground in rainforests is always wet.D.  It is hot and bright in rainforests.(   ) 3. Which might be the best title for Paragraph 4?A.  What's happening to rainforests?B.   What can we find in the rainforest in Java?C.   Why did people cut down the trees in rainforests?D.  Why did many plants and animals disappear in rainforests?(   ) 4. What is the writer's purpose of writing the article?A.  To tell us how to live in rainforests.B.  To help us know some living things in rainforests.C.  To tell us to care for rainforests.D.  To advise us to make full use of rainforests.(   ) 5. What's the importance of rainforests according to the passage?A.  They make the air fresh.B.  They offer us wood,rubber, fruit, and so on.C.  They control the temperature.D.  Both A and B.