问题 读图填空题

生态系统是一个统一的整体,具有一定的结构和功能。如下图是某草原生态系统的模型,数字代表能量数值,单位是J/(cm2·a),请回答下列问题:

(1)生态系统的稳定性是指生态系统具有______自身结构和功能相对稳定的能力,这种自我调节能力的基础是_______。如果该草原生态系统中次级消费者大量减少,生产者的数量将_______。

(2)图中揭示生态系统的主要功能是______,维持该生态系统的正常功能,还需要不断获得__________。

(3)已知生产者固定的能量是1600J/(cm2·a),在面积100cm2的范围内,每年输入初级消费者的能量数值为____J,次级消费者增加50千克,至少需要生产者______千克。

答案

(1)保持或恢复   负反馈   减少(或先减少后趋于平衡)

(2)能量流动和物质循环   来自系统外的能量补充(或能量的输入、太阳能)

(3)20000    4000

阅读理解

阅读理解。

    Xiao Shen Yang, the new partner of comedian Zhao Benshen at this year's spring festival gala, has

 become an overnight sensation (一夜出名). He continues to cause a stir (轰动) among comedy fans.

     Xiao Shen Yang shot to fame (名声) instantly after performing in the CCTV Spring Festival Gala.

     Footage of his comic sketches has appeared almost all the video sharing web-sites. His blog has

 received five million hits, and each of his postings is read by about 300-thousand people. DVDs of the

 young comic star's performances also top sales lists.

     Xiao Shen Yang is a performer of Er Ren Zhuan, a popular comic form in northeast China. Many

 people are buying discs of his Er Ren Zhuan performances.

     Xiao Shen Yang will star in a show about Er Ren Zhuan, at the Beijing Exhibition Center on March the

  7th. Tickets have nearly sold out already.

1. What is Xiao Shen Yang?

    A. A partner

    B. A comedian Zhao Benshen

    C. A performer of Er Ren Zhuan

    D. A star

2. When is he   famous?

    A. At last year's spring festival gala

    B. In northeast China

    C. At the Beijing Exhibition Center on March the 7th

    D. In the CCTV Spring Festival Gala

3. Do people like him ?

    A.No, they don't.

    B. Yes,they do

    C. No, they do

    D. Yes, they don't

4. Where is  Er Ren Zhuan?

    A. At the Beijing Exhibition Center

    B. In northeast China

    C. In Shanghai

    D. In Beijing

5. On March the 7th,what will Xiao Shen Yang do ?

    A. He will buy  discs

    B. He will sell tickets

    C. He will be famous

    D. He will perform Er Ren Zhuan

单项选择题 A3/A4型题