问题 选择题

以下关于食物链的表示方法,正确的是(  )

A.田鼠→蛇→鹰

B.猫头鹰→蛇→田鼠→草

C.草→田鼠→蛇→猫头鹰

D.阳光→草→田鼠→猫头鹰

答案

食物链反映的是生产者与消费者之间吃与被吃这种关系的,所以食物链中不应该出现分解者.食物链的正确写法是:生产者→初级消费者→次级消费者…注意起始点是生产者.

A、田鼠属于消费者,而食物链必须从食物链开始,故不符合题意;

B、猫头鹰属于消费者而食物链必须从食物链开始,且把整个食物链都写反了,故不符合题意;

C、该食物链正确的表示了生产者草与消费者田鼠、蛇、猫头鹰它们四者的关系,故符合题意;

D、阳光是非生物部分,既不属于生产者也不属于消费者,食物链的概念未包括非生物部分,故不符合题意.

故选C

阅读理解

The sun was just coming up when I headed out to work last May at 6 a.m. Not quite dark but dark enough to need my headlights. I turned onto one of the lonely rural country roads.

Maybe it was because I was listening to the radio, maybe it was because I was already thinking about some projects at work, that I didn’t spot the dark object on the road until I was too late. I ran over it and felt the back left tire pull, and then sink. I stopped and got out of the car.

No mystery here---- my back left tyre was cut like a loaf of bread. Back 50 yards was a piece of sharp iron I had run over. I had never changed a tyre. I looked up the road. Not a car in either direction. The nearest service station was miles away. I threw up my hands. Then I remembered---- my cell phone! I powered it up before realizing, I didn’t know who to call.

Wouldn’t you know it, I spotted a car coming from the opposite direction. The driver slowed as he approached. I guessed he could see I was in trouble. He stopped his car, got out and immediately saw the trouble. “Madam, would you like me to change that tyre for you?” he asked. The man couldn’t have been more friendly. I was frightened out there and he put me completely at ease. “There,” he said, after putting on the spare, “you are all set to go.”

“Good thing for me that you were driving this way,” I told him, as I climbed back into my car.

“Funny you should say that,” he said. “Just like you, I was heading to work, but my job is in the opposite direction. I made a wrong turn at some point. I don’t know what I was thinking.”

小题1:The writer didn’t notice the object on the road because ______.

A.it was rather dark then

B.she didn’t use her headlights

C.there was much traffic

D.she was careless when driving小题2:From Paragraph 4 we learn that______.

A.the writer felt quite anxious

B.no one would like to help the writer

C.the writer was a new driver

D.the cell phone should be powered up小题3:What did the man do when he saw the writer?

A.He stopped and laughed at her.

B.He walked over to frighten her.

C.He helped her without hesitation.

D.He drove away in the opposite direction.小题4:The end of the story tells us that the man ______.

A.went a wrong way

B.felt the writer funny

C.didn’t know what he was doing

D.come specially to help the writer

问答题 简答题