B
Forests can be divided into different types according to their climate and location. The most common types are tropical, boreal and temperate.
Tropical rainforests are located near the equator(赤道). They are hot and wet. Although they cover only a tenth of the earth's surface, they are home to about half of all species. The biggest is the Amazon Rainforest in South America. It is often called the "lungs(肺) of the earth" because the plants there produce a lot of oxygen. You'll find monkeys, frogs, jaguars and many other animals there.
Boreal forests are found in the north. These forests are cold. Many animals live there and have adapted to the cold climate by growing thick fur. The Dancing Forest is a strange and beautiful boreal forest in Russia. Its name comes from the twisted trunks of its trees. The pine trees there have leaves shaped like needles(针).
Temperate forests are found all over the world. They are hot or cool at different times of the year. There are some temperate forests in the Jiuzhaigou Valley in Sichuan, for example. Many types of trees grow there, like maples and birches. Their leaves change colour with the seasons and fall off the trees when the weather gets cool. As the weather warms up, the trees grow new leaves.
()44. The Amazon Rainforest is called the "lungs of the earth" because .
A. it is the most beautiful forest on earth
B. the plants there provide a lot of oxygen
C. many animals live there and breathe its air
D. it is home to half of the world's animal species
()45. Where are temperate forests located?
A. They are all found in South America.
B. They are mostly located near the equator.
C. They are found only in the north of the world.
D. They are found in different areas of the world.
()46. Amy is interested in trees with needle-shaped leaves. Which forest would she probably take a trip to?
A. A boreal forest.
B. A temperate forest.
C. Any types of forests.
D. A tropical rainforest.
()47. What is the order of the average(平均的) temperatures of the three types of forests, from the highest to the lowest?
A. Temperate forests ＞ Tropical rainforests ＞ Boreal forests
B. Temperate forests ＞ Boreal forests ＞ Tropical rainforests
C. Tropical rainforests ＞ Boreal forests ＞ Temperate forests
D. Tropical rainforests ＞ Temperate forests ＞ Boreal forests

44. B 【解析】细节理解题。根据“The biggest is the Amazon Rainforest...because the plants there produce a lot of oxygen.”可知,那里的植物提供大量氧气,故选B。
45. D 【解析】细节理解题。根据“Temperate forests are found all over the world.”可知,温带森林分布在世界各地,即它们分布在世界的不同地区,故选D。
46. A 【解析】推理判断题。根据“Boreal forests...The pine trees there have leaves shaped like needles.”可知,寒带森林的松树有针状叶子,所以Amy可能会去寒带森林旅行,故选A。
47. D 【解析】细节排序题。根据“Tropical rainforests are located near the equator. They are hot and wet.”“Boreal forests are found in the north. These forests are cold.”和“Temperate forests...They are hot or cool at different times of the year.”可知,平均温度从高到低的顺序是热带雨林(最热)＞温带森林(次之)＞寒带森林(最冷),故选D。

【分析】
这是一组英语阅读理解题，解题思路为：先通读题目明确考查方向，再带着问题回到原文定位对应段落和关键句子，对比选项内容与原文信息，排除不符合的选项，选出正确答案。具体来看：44题需定位亚马逊被称为“地球之肺”的原因；45题找温带森林的分布位置；46题匹配有针状叶子树木的森林类型；47题根据三种森林的温度描述排序。
【解析】
44. 细节理解题。根据原文第二段“The biggest is the Amazon Rainforest in South America. It is often called the 'lungs of the earth' because the plants there produce a lot of oxygen.”可知，亚马逊雨林被称为“地球之肺”是因为那里的植物提供大量氧气，故选B。
45. 细节理解题。根据原文第四段“Temperate forests are found all over the world.”可知，温带森林分布在世界各地，即不同地区，故选D。
46. 推理判断题。根据原文第三段“Boreal forests...The pine trees there have leaves shaped like needles.”可知，寒带森林的松树有针状叶子，所以对针状叶子树木感兴趣的Amy会去寒带森林，故选A。
47. 细节排序题。根据原文“Tropical rainforests...They are hot and wet.”“Boreal forests...These forests are cold.”“Temperate forests...They are hot or cool at different times of the year.”可知，三种森林平均温度从高到低为热带雨林＞温带森林＞寒带森林，故选D。
【答案】
44.B 45.D 46.A 47.D
【知识点】
英语阅读理解细节题、推理判断题、信息排序题
【点评】
本题为英语阅读理解基础题型，主要考查学生快速定位原文信息的能力，题目难度不大，只要仔细阅读原文，找准对应细节即可正确作答。
【难度系数】
0.8