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How Plants and Animals Live Together
Imagine that nature is a huge social network. The plants and animals in it are building different kinds of relationships(关系）every day.
Some plants and animals are best friends. They help each other. For example, the acacia tree gives the ants a home and food. The ants protect the tree from animals that want to eat it.
Sometimes, they fight for the same things such as food and sunlight. A big tree and a vine are like this. They both need sunlight. The vine grows up the tree to get more sunlight. The tree tries to grow taller. They are competing.
Some plants eat insects. Usually, animals eat plants. But some plants eat animals! The pitcher plant（猪笼草） is a sweet-smelling plant. Insects come to it and fall inside. The plant eats the insects for food. This is a special form of predation.
Sometimes, one gets help, and the other feels nothing. As for this, there is also an example. A bird builds a nest in a tree. The bird gets a home. The tree is not helped or hurt.
Nature is full of these interesting relationships.
(
A. They make more trees.
B. They keep other animals away.
C. They give the tree water.
D. They help the tree find food.
(
A. Water.
B. Friends.
C. Sunlight.
D. Food.
(
A. It helps insects.
B. It is food for animals.
C. It eats insects.
D. It smells very bad.
(
A. Animals are stronger than plants.
B. Plants and animals have different relationships.
C. All plants and animals are friends.
D. Nature is a dangerous place.
Imagine that nature is a huge social network. The plants and animals in it are building different kinds of relationships(关系）every day.
Some plants and animals are best friends. They help each other. For example, the acacia tree gives the ants a home and food. The ants protect the tree from animals that want to eat it.
Sometimes, they fight for the same things such as food and sunlight. A big tree and a vine are like this. They both need sunlight. The vine grows up the tree to get more sunlight. The tree tries to grow taller. They are competing.
Some plants eat insects. Usually, animals eat plants. But some plants eat animals! The pitcher plant（猪笼草） is a sweet-smelling plant. Insects come to it and fall inside. The plant eats the insects for food. This is a special form of predation.
Sometimes, one gets help, and the other feels nothing. As for this, there is also an example. A bird builds a nest in a tree. The bird gets a home. The tree is not helped or hurt.
Nature is full of these interesting relationships.
(
B
)50. In the passage, how do the ants help the tree?A. They make more trees.
B. They keep other animals away.
C. They give the tree water.
D. They help the tree find food.
(
C
)51. What are the big tree and the vine fighting for?A. Water.
B. Friends.
C. Sunlight.
D. Food.
(
C
)52. What is special about the pitcher plant?A. It helps insects.
B. It is food for animals.
C. It eats insects.
D. It smells very bad.
(
B
)53. What is the main idea of the passage?A. Animals are stronger than plants.
B. Plants and animals have different relationships.
C. All plants and animals are friends.
D. Nature is a dangerous place.
答案
50.B 51.C 52.C 53.B
解析
【分析】
做此类英语阅读理解题，需先通读原文把握大意，再根据题干关键词定位原文对应内容，对比选项得出答案。
50题：根据题干关键词“ants help the tree”定位到第二段，找到蚂蚁对树的帮助；
51题：根据关键词“big tree and vine fighting for”定位到第三段，明确二者争夺的资源；
52题：根据关键词“pitcher plant special”定位到第四段，分析猪笼草的特殊之处；
53题：需归纳全文核心内容，确定主旨。
【解析】
50题：原文第二段提到“The ants protect the tree from animals that want to eat it”，即蚂蚁保护树免受想吃它的动物伤害，对应选项B“keep other animals away”，故选B；
51题：原文第三段指出“A big tree and a vine... They both need sunlight. They are competing”，说明大树和藤争夺阳光，对应选项C，故选C；
52题：原文第四段说明“Some plants eat insects... The pitcher plant... The plant eats the insects for food”，猪笼草的特殊之处是吃昆虫，对应选项C，故选C；
53题：全文围绕动植物之间的互助、竞争、捕食、一方受益另一方无影响等不同关系展开，主旨是动植物有不同关系，对应选项B，故选B。
【答案】
50.B 51.C 52.C 53.B
【知识点】
英语阅读理解、细节理解题、主旨大意题
【点评】
本题是一篇关于动植物关系的英语阅读理解题，考查学生定位细节信息和归纳主旨的能力，题型常规，难度适中。
【难度系数】
0.8
做此类英语阅读理解题，需先通读原文把握大意，再根据题干关键词定位原文对应内容，对比选项得出答案。
50题：根据题干关键词“ants help the tree”定位到第二段，找到蚂蚁对树的帮助；
51题：根据关键词“big tree and vine fighting for”定位到第三段，明确二者争夺的资源；
52题：根据关键词“pitcher plant special”定位到第四段，分析猪笼草的特殊之处；
53题：需归纳全文核心内容，确定主旨。
【解析】
50题：原文第二段提到“The ants protect the tree from animals that want to eat it”，即蚂蚁保护树免受想吃它的动物伤害，对应选项B“keep other animals away”，故选B；
51题：原文第三段指出“A big tree and a vine... They both need sunlight. They are competing”，说明大树和藤争夺阳光，对应选项C，故选C；
52题：原文第四段说明“Some plants eat insects... The pitcher plant... The plant eats the insects for food”，猪笼草的特殊之处是吃昆虫，对应选项C，故选C；
53题：全文围绕动植物之间的互助、竞争、捕食、一方受益另一方无影响等不同关系展开，主旨是动植物有不同关系，对应选项B，故选B。
【答案】
50.B 51.C 52.C 53.B
【知识点】
英语阅读理解、细节理解题、主旨大意题
【点评】
本题是一篇关于动植物关系的英语阅读理解题，考查学生定位细节信息和归纳主旨的能力，题型常规，难度适中。
【难度系数】
0.8
