问题 读图填空题

生物多样性主要包括          、          和           。

答案

物种多样性;基因多样性;生态系统多样性

题目分析:

生物多样性通常包含三层含义,即生物种类的多样性、基因的多样性和生态系统的多样性。生物种类的多样性是指一定区域内生物钟类(包括动物、植物、微生物)的丰富性,如我国已知鸟类就有1244种之多,被子植物有3000种,即物种水平的生物多样性及其变化。基因的多样性是指物种的种内个体或种群间的基因变化,不同物种(兔和小麦)之间基因组成差别很大,同种生物如兔之间(有白的、黑的、灰的等)基因也有差别,每个物种都是一个独特的基因库。基因的多样性决定了生物种类的多样性;生物种类的多样性组成了不同的生态系统;生态系统的多样性是指生物群落及其生态过程的多样性,以及生态系统的环境差异、生态过程变化的多样性等。

阅读理解

阅读理解。

     Last year , we had an English teacher from the United States. We called him Mr. Black. He often

told us,"English is very useful in the world. "He taught us very well. He was strict with us all. In class he

always gave us more time to speak English. At first I could hardly understand a word and I could not talk

in English at all. But soon I found English was not so hard and I could talk to my classmates in English. So

I began to like it very much.

     Now Mr. Black taught in another school. This year we have a new teacher, Mrs Green. She also

teaches us very carefully. She often asks us to recite(背诵) the texts and play games. With the help of

the two foreign teachers, we all have made progress.

     Now I am enjoying studying this subject. I am sure I will learn a lot this year.

1. Which of the following is TRUE? 

    A. This year our English teacher is still Mr. Black. 

    B. Mr. Black told us that English was the most important language in the world. 

    C. In Mr. Black’s class,students do not have much time to speak English. 

    D. Mrs Green often plays games with us.

2. Mr. Black was a good teacher because _____ .

    A. I could hardly understand what he said in class

    B. he was strict with us and taught us well

    C. he was from America but could speak much Chinese 

    D. we often play games with him after class

3. Why did the students make progress? 

    A. Because they studied harder than before. 

    B. Because the teachers are both from America. 

    C. Because they are enjoying the subject and interested in it.  

    D. Because English is more and more useful in the world.

4. According to the passage , we understand that _____ . 

    A. interest is the best teacher 

    B. a foreign teacher is better than a Chinese teacher. 

    C. reciting texts is the only way to learn English 

    D. English is so easy that everyone can learn it well

5. Which of the following is referred in the passage? 

    A. Mr. Black always spent much time talking in English in class. 

    B. Both of the two foreign teachers are from the same country. 

    C. All the students like foreign teachers because they are strict with them selves. 

    D. It's hard to get on well with a foreign teacher.

单项选择题 A3/A4型题