如图所示,为农民采用的笼养蝇蛆法而形成的食物网。(说明:鸡粪中含有较多的营养物质

题型:读图填空题

问题:

如图所示,为农民采用的笼养蝇蛆法而形成的食物网。(说明:鸡粪中含有较多的营养物质未被消化,因此可再添其它饲料养猪,以生态学的角度看,这是一个理想的生态系统)按图回答:

(1)该生态系统____________的作用非常突出。

(2)流经该生态系统的总能量是_________。

(3)建立这一生态系统的目的是________________。

(4)猪粪经过________的作用,可被农作物再利用;猪粪中的氨经过_________(生物)硝化作用,形成NO3-和NO2-被农作物吸收。

(5)在该生态系统内,物质经多次重复利用,提高了__________________。

(6)该生态系统是根据_______________和物质循环再生原理建立。

考点:生态系统的能量流动生态系统的类型
题型:读图填空题

下面不属于文件控制块内容的是( )。

A.文件名

B.文件记录总数

C.文件属性

D.访问口令

题型:读图填空题

1~2ml注射液一般采用()

A.干热空气灭菌

B.滤过灭菌

C.气体灭菌

D.热压灭菌

E.流通蒸汽灭茵

题型:读图填空题

阅读理解

     Are you the only child in your family? If so, you are the most important in your family.

     Parents are the closest people to you in the world. But a lot of middle school students have a problem. They feel they're not as close to their parents as before. They even don't think their parents are fair to them.

     Some students complain that their parents often say a lot to them, but never listen to them. Some say their parents don't allow them to play computer games when other classmates are doing that. Others say when they're making phone calls to friends, their parents like to ask if they are speaking to a boy or a girl. These make them very unhappy. Some students even decide to leave home because they're afraid to tell their parents when they have done something wrong, especially when they do badly in exams. Then they usually think running away is the only choice. But they don't know running away may bring them some more problems.

     Problems are parts of life. Here are some suggestions for you to solve your problems.

     Find a good chance to talk with your parents. Don't be afraid to tell them your feelings.

     Get help from others like good friends or teachers.

     Keep a diary to help you understand more about yourself and your feelings.

     Show your parents you're growing up. Then they'll feel you're no longer a small child.

     If you follow the advice, you'll have a happy life and never think of running away.

1. According to the article,_____ are the closest people to an only child.

A. teachers        

B. classmates      

C. friends      

D. parents

2. Which of the following is TURE?

A. Parents don't love their children now.

B. Middle school students don't have any problems.

C. Some students don't think their parents are fair to them.

D. All the students are afraid to tell their parents the truth

3. We'd better _____ if we have problems

A. quarrel with our parents            

B. talk with our parents              

C. leave our parents                  

D. ignore our parents

题型:读图填空题

在建设投资中,()属于动态投资部分。

A.基本预备费

B.建设期利息

C.设备运杂费

D.铺底流动资金

题型:读图填空题

以下哪一项不是岛屿的选取原则?()

A.根据选取标准进行选取

B.根据分布范围和密度进行选取

C.根据重要意义进行选取

D.根据外部特征进行选取

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