B
The body of nearly all flowering plants can be divided into two systems,the root system which grows below ground and the shoot system which grows above it.The typical root system fixes the plant firmly in the soil,and absorbs water and various dissolved raw materials from it.The typical shoot system consists of a main stem upon which are borne leaves,branch shoots,and sometimes flowers.It should be emphasized that the words “stem” and “shoot” are not synonymous,the word “shoot” being a collective term for both stem and leaves.The leaves are the chief food-producing process called photosynthesis.The stem supports the leaves,displaying them in the light needed for photosynthesis,and also acts as the main channel of communication between the various organs of the plant.Water and dissolved minerals absorbed by the roots are carried in the stem to the leaves and flowers,and foods synthesized in the leaves are conducted away through the stem to other regions of the plant,both above and below ground,where they are either used for growth or else stored for future use.Flowers are organs that are concerned with the reproduction of the species by seeds.
25What is the root used to do?
A.To carry water from the well.
B.Just to make the plants stay in the soil.
C.To fix the plants and carry water and food for the plants.
D.To make materials for the plants.
答案:C
解析:细节理解题。从“The typical root system fixes the plant firmly in the soil,and absorbs water and various dissolved raw materials from it.”看出根是固定植物和为植物输送水和营养的。
26What does the word “synonymous” mean in the passage?
A.Being of the cutdown meanings.
B.Being of the similar meanings.
C.Being of the different meanings.
D.Being of opposite meanings.
答案:B
解析:词义猜测题。从“It should be emphasized that the words ‘stem’ and ‘shoot’ are not synonymous,the word ‘shoot’ being a collective term for both stem and leaves.”看出stem和shoot并不是同义词。stem是植物的茎,shoot是苗芽,shoot包含stem和leaves。
27What is the major food-producing process?
A.The leaves. B.The root.
C.The flowers. D.The shoot.
答案:A
解析:细节理解题。本题答案由“The leaves are the chief food-producing process called photosynthesis.”可知。
28What is the passage mainly about?
A.How plants produce seeds.
B.How leaves grow.
C.Different kinds of flowers.
D.The structure of plants.
答案:D
解析:主旨大意题。本篇短文主要讲述了植物的构成,而不是讲植物或叶子是如何生长的,也不是讲各种各样的花。
The body of nearly all flowering plants can be divided into two systems,the root system which grows below ground and the shoot system which grows above it.The typical root system fixes the plant firmly in the soil,and absorbs water and various dissolved raw materials from it.The typical shoot system consists of a main stem upon which are borne leaves,branch shoots,and sometimes flowers.It should be emphasized that the words “stem” and “shoot” are not synonymous,the word “shoot” being a collective term for both stem and leaves.The leaves are the chief food-producing process called photosynthesis.The stem supports the leaves,displaying them in the light needed for photosynthesis,and also acts as the main channel of communication between the various organs of the plant.Water and dissolved minerals absorbed by the roots are carried in the stem to the leaves and flowers,and foods synthesized in the leaves are conducted away through the stem to other regions of the plant,both above and below ground,where they are either used for growth or else stored for future use.Flowers are organs that are concerned with the reproduction of the species by seeds.
25What is the root used to do?
A.To carry water from the well.
B.Just to make the plants stay in the soil.
C.To fix the plants and carry water and food for the plants.
D.To make materials for the plants.
答案:C
解析:细节理解题。从“The typical root system fixes the plant firmly in the soil,and absorbs water and various dissolved raw materials from it.”看出根是固定植物和为植物输送水和营养的。
26What does the word “synonymous” mean in the passage?
A.Being of the cutdown meanings.
B.Being of the similar meanings.
C.Being of the different meanings.
D.Being of opposite meanings.
答案:B
解析:词义猜测题。从“It should be emphasized that the words ‘stem’ and ‘shoot’ are not synonymous,the word ‘shoot’ being a collective term for both stem and leaves.”看出stem和shoot并不是同义词。stem是植物的茎,shoot是苗芽,shoot包含stem和leaves。
27What is the major food-producing process?
A.The leaves. B.The root.
C.The flowers. D.The shoot.
答案:A
解析:细节理解题。本题答案由“The leaves are the chief food-producing process called photosynthesis.”可知。
28What is the passage mainly about?
A.How plants produce seeds.
B.How leaves grow.
C.Different kinds of flowers.
D.The structure of plants.
答案:D
解析:主旨大意题。本篇短文主要讲述了植物的构成,而不是讲植物或叶子是如何生长的,也不是讲各种各样的花。
