问题 选择题

组成植物种子的主要结构是

①种皮    ②胚芽    ③胚轴    ④胚根    ⑤子叶    ⑥胚乳

A.①②③④

B.③④⑤⑥

C.②③④⑤

D.①②⑤⑥

答案

答案:C

题目分析:我们知道种子的结构中都有种皮和胚两结构(有部分植物的种子有胚乳).其中胚可以发育成植物体,是新植物的幼体,是种子的主要结构.而胚又包括胚芽将来发育成茎和叶;子叶储存营养物质;胚轴将来发育成连接茎和叶的部分;胚根将来发育成根.所以组成植物种子的主要结构是②胚芽、③胚轴、④胚根、⑤子叶.

阅读理解

阅读理解。

     Reading newspapers has become an important part of our life.  Many people begin their day by

reading the papers.  In this way they learn what is going on in the world.  Sometimes, however, they

do not have time to read the news carefully, so they just take a quick look at the front page; at other

times they may be in such a hurry that they have time only to look at the headlines(标题).

     There are newspapers to meet the needs of every reader.  In big cities there are many kinds of

papers. In small towns there are fewer newspapers. In some places the paper is published(出版)

once a week.

     Today, as a group, English language newspapers enjoy the largest number of readers.  With the 

development(发展) of the world,  some new newspapers will be published in the years to come.

1. Many people______as the first thing every morning.                 

A. read newspapers          

B. watch the TV news      

C.listen to the radio       

2.When people are busy, they______.      

A. still read newspapers carefully

B. only look at the front page of the paper carefully

C. either take a quick look at the front page of the paper or only look at the headlines             

3. Which of the following is right?       

A. There are different kinds of newspapers to meet people's needs.

B. There are more papers in small towns than in big cities.

C. The most important news is not on the front page.            

4.______enjoy the largest number of readers.    

A. Newspapers in Chinese      

B. Newspapers in English        

C. Newspapers in German    

5. "Some new newspapers will be published in the years to come. " means______.          

A. more newspapers will be published next year

B. more new kinds of papers will be read in the coming year

C. a great number of new newspapers will be seen in the future

单项选择题