问题 选择题

下列被称为中生代“活化石”的、我国特有的爬行动物是(  )

A.眼镜蛇

B.扬子鳄

C.蜥蜴

D.大熊猫

答案

A、眼镜蛇是眼镜蛇科中的一些蛇类的总称,主要分布在亚洲和非洲的热带和沙漠地区.眼镜蛇最明显的特征是颈部,该部位肋骨可以向外膨起用以威吓对手.因其颈部扩张时,背部会呈现一对美丽的黑白斑,看似眼镜状花纹,故名眼镜蛇.故该选项不符合题意;

B、扬子鳄或称作鼍,是中国特有的一种鳄鱼,是世界上体型最细小的鳄鱼品种之一.它既是古老的,又是现在生存数量非常稀少、世界上濒临灭绝的爬行动物.在扬子鳄身上,至今还可以找到早先恐龙类爬行动物的许多特征.所以,人们称扬子鳄为中生代的“活化石”.故该选项符合题意;

C、蜥蜴属于冷血爬虫类,和它出现在三叠纪时期的早期爬虫类祖先很相似.大部分是靠产卵繁衍,但有些种类已进化成可直接生出幼小的蜥蜴.蜥蜴俗称“四足蛇”,有人叫它“蛇舅母”,是一种常见的爬行动物.故该选项不符合题意;

D、大熊猫,一般称作“熊猫”,是世界上最珍贵的动物之一,数量十分稀少,属于国家一级保护动物,体色为黑白相间,被誉为“中国国宝”.大熊猫是中国特有种,属熊科,现存的主要栖息地在中国四川、陕西等周边山区.适应以竹子为食的生活.大熊猫憨态可掬的可爱模样深受全球大众的喜爱,在1961年世界自然基金会成立时就以大熊猫为其标志.故该选项不符合题意.

故选:B.

阅读理解

A Trip to the Forest

One day Bob took two of his friends into the mountains. They put up their tents and then rode off to a forest to see how the trees were growing.

In the afternoon when they were about ten kilometres from their camp(营地), it started to snow. More and more snow fell. Soon Bob could hardly see his hands before his face. He could not find the road. Bob knew there were two roads. One road went to the camp, and the other went to his house. But all was white snow. Everything was the same. How could he take his friends back to the camp?

Bob had an idea. The horses! Let the horses take them back! But what would happen if the horses took the road to his house? That would be a trip of thirty-five kilometres in such cold weather!

It was getting late. They rode on and on. At last the horses stopped. Where were they? 

None of them could tell. John looked around. What was that under the tree? It was one of their tents!

小题1:John and his two friends went to the forest to ________.

A.build their camp

B.find their way home

C.enjoy the mountains in the snow

D.watch the trees in the forest小题2:They could not find their way back because ________.

A.there was only one road to their camp

B.they couldn’t decide which of the two roads led to their tents

C.there were no roads in the mountains at all

D.everything was covered by the white snow小题3:It is clear that they wanted the horses to take them to _______.

A.John’s house

B.the camp

C.the forest

D.the mountains小题4:The horses stopped because _______.

A.it was getting late

B.they were tired after running for a long way

C.they knew that they had got to the camp

D.they had seen John’s house小题5:The story happened _______.

A.on a cold winter day

B.on a dark snowy evening

C.in a cold camp far from villages

D.at night when nothing could be seen

问答题 简答题