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Frogs are animals that can live both in ...

Frogs are animals that can live both in water and on land. There are more than 5,000 kinds of frogs on the earth. The earliest known frogs lived about 190 million years ago and the frogs today still look the same. Here are some fun things that you might not know about frogs. Enjoy!

The Biggest and the Smallest Frogs

Some frogs can be very big. The biggest kind of frog is the Goliath Frog in West Africa. Its body can be nearly 30cm long, about the size of a large cat. The Gold Frog and the Poison Frog are the smallest frogs in the world. They are less than 1cm long. Though the Poison Frog is very small, it is not weak at all. It is dangerous. Any animal that eats it will die very soon.

The Best Jumpers

Frogs are very good at jumping. They developed jumping legs so that they would not be eaten by other large animals. Using their big strong legs, more frogs can jump over 20 times their own length. It is like a person jumping over about 30,48. The Australian Rocket Frog can even jump over 2m, which is 50 times its body length(5.5cm). That might be the reason why frogs are called the best jumpers on the earth.

The Cryogenic Animal

Some frogs like the Common Wood Frog have a special ability to live in very cold places. When the temperature goes down, they become ice frogs. 2/3of their body water freezes. Their hearts stop, and their breathing stops too. You may think they are dead, but in fact they are not. Maybe we humans can learn the way that the frogs do for medical purpose.

1.The earliest frogs lived about ________ million years ago.

A. 20  B. 30   C. 50   D. 190

2.The Gold Frog is one of the ________ frogs on the earth.

A. smallest   B. biggest   C. strongest   D. weakest

3.________ can jump over 2m.

A. The Goliath Frog   B. The Common Wood Frog

C. The Poison Frog   D. The Australian Rocket Frog

4.What will happen to a Common Wood Frog at very low temperature?

A.It will die very soon.   B. It will be an ice frog.

B.It will become dangerous.   D. It will become very small

 

1.D 2.A 3.D 4.B 【解析】 试题分析:本文叙述了青蛙是水陆两栖动物,世界上有5000多种青蛙。最早的青蛙生活在大约1亿九千万年前,和今天的青蛙看上去一样。并一一介绍了最大的青蛙,最小的青蛙,跳得最远的青蛙和能承受最低温度的青蛙。 1.细节理解题。根据第一段“The earliest known frogs lived about 190 million years ago”可知本题选D。 2.细节理解题。根据第二段“The Gold Frog and the Poison Frog are the smallest frogs in the world.”可知本题选A。 3.细节理解题。根据第三段“The Australian Rocket Frog can even jump over 2m,” 可知本题选D。 4.细节理解题。根据第四段“When the temperature goes down, they become ice frogs.” 可知本题选B。 考点:科普环保类阅读。
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