问题 单项选择题

海洋中珊瑚的美丽颜色来自于其体内与之共生的藻类生物,其中虫黄藻是最重要的一类单细胞海藻。二者各取所需,相互提供食物。全球气候变暖造成的海水升温导致虫黄藻等藻类大量死亡,进而造成珊瑚本身死亡,引发白化现象。然而研究发现,珊瑚能通过选择耐热的其他藻类生物等途径,来应对气候变暖带来的挑战。
以下哪项如果为真,将削弱这一研究发现( )

A.一些虫黄藻能够比耐热的其他藻类耐受更高的海水温度
B.有些藻类耐热性的形成需要一个长期的过程
C.有些虫黄藻逐渐适应了海水温度的升高并存活下来
D.有些已白化的珊瑚礁中也发现了死去的耐热藻类生物

答案

参考答案:D

解析: 题干的结论是珊瑚能通过选择耐热的其他藻类生物等来应对气候变化。A、C项的说法与题意正好相反,可以排除;B项的说法比较含糊其辞,并不能削弱上述观点,也可排除;在白化的珊瑚中也发现了耐热藻类生物,说明耐热藻类生物也不能帮助珊瑚来应对气候变化。故选D。

阅读理解

阅读理解

       Henry was an office worker in a big city. He worked very hard and enjoyed traveling in    his holidays. He usually went to the seaside. But one year he saw an advertisement in a newspaper. "Enjoy country life. Spend a few weeks at West Hill Farm. Good food. Fresh air. Horse riding. Walking. Fishing. Cheap and

interesting. "

       "This sounds like a good idea," he thought. "I'll spend a month at West Hill Farm. I think I can enjoy

horse riding, walking and fishing. They'll make a change from sitting by the seaside and swimming. " He

wrote to the farmer. In the letter he said that he would like to spend all of July there. Then on the first day

of July, he left for West Hill Farm.

       But four days later, he returned home.

       "What was wrong with West Hill Farm?" his best friend, Edward, asked him.

       "Didn't you enjoy country life?" "Country life was very good," Henry said. "But there was another

problem. "

       "Oh. What?"

       "Well," he said, "the first day I was there a sheep died, and we had roast mutton for dinner. "

       ''What's wrong with that?" Edward asked. "Fresh meat is the best. "

       "I know, but on the second day a cow died, and we had roast beef for dinner. "

       "Lucky you ! "

       "You don't understand," Henry said.

       ''On the third day a pig died and we had roast pork for dinner. "

       "A different meat every day," Edward said loudly, "and you are complaining! "

       "Let me finish," Henry said. "On the fourth day the farmer died, and I didn't dare(敢) stay for dinner?"

1. How did Henry find out about the farm?    

A. He saw it in a newspaper advertisement.

B. His best friend told him.

C. He wrote to the farmer.

D. Maybe he learned it from the radio.

2. Henry came back home several days later because         .       

A. he didn't like the country life at all

B. the farmer wasn't friendly to him

C. his holiday was over

D. he thought he might have to eat the farmer

3. "... and you are complaining!", the word "complain" means "          " in Chinese.    

A. 夸奖      

B. 说三道四      

C. 抱怨        

D. 故弄玄虚

4. Which of the following sentences is TRUE? 

A. Edward could eat a different kind of meat every day.

B. Henry thought he could enjoy a change.

C. Henry couldn't think of anything else to do, so he went to the farm.

D. The farmer died because of the bad meat he ate.

5. Which of the following is the best title for the passage?   

A. What a beautiful farm !

B. Have a good time.

C. A short holiday.

D. Henry and the farmer.

单项选择题 A1型题