问题 选择题

下列有关生态系统的说法中不正确的是(  )

A.牛粪便中有机物所含能量,应是生产者所固定的能量的一部分

B.大鱼吃小鱼可为种间斗争中的捕食关系,也可为种内斗争

C.花卉晚上放在室内过夜,人与花卉之间不存在竞争关系

D.有些植物在生态系统中即可是生产者,又可是消费者,也有不属于生产者的植物,如菟丝子

答案

花卉在夜间进行呼吸作用消耗氧气分解有机物产生二氧化碳和水,使卧室内的氧气减少,二氧化碳增多;人的呼吸作用也要消耗氧气,产生二氧化碳.这样人、花争氧,使卧室内的氧气过少,二氧化碳过多,不利于人体健康.

故选C.

阅读理解

阅读理解。

     Some names have special meanings in popular American expressions. One day, an average Joe was

walking down the street. An average Joe is a common person-either male or female. He was lost. He did

not know where he was going. So average Joe asked John Q. Public for directions to the nearest bank.

John Q. Public is also a common person-male or female. "Jeez Louise," said John Q., Public. This is an

expression of surprise. "Don't you know that all banks are closed today? It is Saturday."

     "For Pete's sake," said average Joe. This is also an expression used to show a feeling like surprise or

disappointment. "I do not believe you," said he. At that moment, Joe Blow was walking down the street

with a woman. Joe Blow is also an expression for a common person. Now this Joe Blow was not walking

next to a plain Jane. A plain Jane is a woman who is neither ugly nor pretty. The woman with Joe Blow

was a real Sheila-a beautiful woman.

     Average Joe asked the woman if all banks were closed on Saturday. "No way, Jose," she answered.

This is a way of saying "no." "Many banks are open on Saturdays."

     Average Joe did not know either of these two people from Adam. That is, he did not know them at all.

But he followed their directions to the nearest bank.

     When he arrived, he walked to the desk and said:"I am here to withdraw some money so I can pay my

taxes to Uncle Sam". This represents the United States government. The banker produced some papers

and told him to sign his John Hancock at the bottom. A John Hancock is a person's signed name-a signature

Historically, John Hancock was one of the signers of the United States Declaration of Independence. Hancock

had a beautiful signature and signed his name larger than all the others.

1. The main idea of this text is that _____. [ ]

A. some popular American names have special stories

B. some popular American expressions have some special names

C. some popular American names have special meanings

D. some popular American expressions are interesting

2. The main idea of this text is that _____.

[ ]

A. some popular American names have special stories

B. some popular American expressions have some special names

C. some popular American names have special meanings

D. some popular American expressions are interesting

3. The name "Jeez Louise" is _____. [ ]

A. an expression of surprise 

B. a feeling like disappointment

C. an expression for a common man

D. a woman who is neither ugly nor pretty

4. What does the banker really want to ask Joe to sign on the papers?[ ]

A. John Hancock.

B. United States Declaration.

C. His own name.

D. Uncle Sam.

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