阅读理解。
主题群 子主题 语篇类型 难度
自然生态 了解树木 说明文 ★★
Trees are important in our daily life. What are the parts of a tree?
Seeds Like many plants, a tree begins from a seed. A seed needs food, water and sunlight to grow.
Roots All of the trees have roots. They go into the soil and have two important jobs to do. They make the tree stand, and they take in water and other things from the soil.
Trunks(树干) The trunk of a tree supports the branches(树枝) of the tree and moves water and other things from the soil to the other parts of the tree.
Branches Branches grow out from the trunk. They are the growing ends of the tree.
They also move water and other things from the trunk to the leaves.
Leaves Leaves can catch sunlight. Using sunlight, the leaves produce food for the whole tree. Leaves use the water from the soil to make sugar to feed the tree. At the same time, trees release(释放) oxygen into the air. This is very important, because all the animals and humans need oxygen to live.
1. A tree begins from a ______ .
A. branch B. seed C. root D. leaf
2. What does "soil" mean?
A. 空气 B. 阳光 C. 土壤 D. 营养
3. Which part of the tree can move water and other things from the trunk to the leaves?
A. Leaves. B. Seeds. C. Roots. D. Branches.

1.B 2.C 3.D

【分析】
本题是关于树木的说明文阅读理解，考查细节理解与词汇含义推断。解题思路：1. 第1题定位原文中关于树起源的内容，匹配选项；2. 第2题结合Roots部分的语境和常识，推断单词soil的意思；3. 第3题定位原文中描述各部分功能的内容，找到对应结构。
【解析】
1. 细节理解题：根据原文Seeds部分“A tree begins from a seed.”可知，树的起源是种子，对应选项B，故选B。
2. 词汇理解题：根据Roots部分“They go into the soil”及常识，根生长在土壤里，因此soil意为“土壤”，对应选项C，故选C。
3. 细节理解题：根据原文Branches部分“They also move water and other things from the trunk to the leaves.”可知，负责将水和其他物质从树干运到叶子的是树枝，对应选项D，故选D。
【答案】
1.B 2.C 3.D
【知识点】
阅读理解细节理解；词汇含义推断
【点评】
本题围绕树木结构展开，题型为基础细节题，需学生精准定位原文信息，难度适中，适合中等水平学生完成。
【难度系数】
0.6