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 l 题目和参考答案——青夏教育精英家教网—

题目内容

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. The Australian Rocket Frog can even jump over 2m, which is 50 times its body length (5.5 cm). 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.
【小题1】The earliest frogs lived about million years ago.

A．20

B．30

C．50

D．190

【小题2】 can jump over 2m.

A．The Goliath Frog

B．The Common Wood Frog

C．The Poison Frog

D．The Australian Rocket Frog

【小题3】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.

C．It will become dangerous.

D．It will become very small.

【小题1】D
【小题2】D
【小题3】B

解析试题分析：这篇短文重点介绍了世界上的各种青蛙，详细的描述了他们的生理特点及生活习性。
【小题1】根据第一段The earliest known frogs lived about 190 million years ago 描述，可知选D。
【小题2】根据The Australian Rocket Frog can even jump over 2m, 描述，可知选D。
【小题3】根据最后一段When the temperature goes down, they become ice frogs. 描述，可知选B。
考点：关于青蛙的说明文阅读
点评：本文浅显易懂，层次分明，学生很容易把握文章中心内容。答题中注意带着问题阅读短文，一般就能顺利找出答题依据。对于不能直接找到根据的问题注意联系上下文，根据短文中心总结出正确答案。

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相关题目

What will the weather be like? Some people say they can know what the weather will be like from birds. When they see birds fly high out to the sea, they know it is a nice day, because birds don't like to fly out if it rains. When the weather is bad, the birds will come back to the beach. A big wind may come with a rain. Birds do not like to fly in a big wind. They may sit in a tree when rain is coming. Other animals can also tell the weather. It is a cloudy day. The rain is coming. Chickens are not quiet, and they are running here and there. Frogs are making big noise in the pool. If it is a nice day, the frogs will come out of the water.
【小题1】How many kinds of animals can we find in the passage?

【小题2】We can go and play beach volleyball when birds __________.

A．come back

B．fly high in the sky

C．play on the beach

D．B and C

【小题3】When there is rain, frogs are _________.

A．In the lake and river	B．out of the winter
C．making a big voice	D．not quiet

【小题4】What does the underlined(划线的) word ‘’tell” mean in the article?

【小题5】What does the article mean?

A．We must protect (保护) the animals.

B．Birds do not like to fly in the rain and big wind.

C．Some animals aren’t quiet when the rain is coming.

D．We can know what the weather will be like from the animals.

What will the weather be like? Some people say they can know what the weather will be like from birds. When they see birds fly high out to the sea , they know it is a nice day, because birds don’t like to fly out when it will rain. When the weather will be bad, the birds come back to the beach. A big wind may come with a rain. Birds do not like to fly in a big wind. They may sit in a tree when rain is coming. Other animals can also tell the weather. It’s a cloudy day. The rain is coming. Chickens aren’t quiet, and they are running here and there. Frogs(青蛙) are making big noise in the pool. If it is a nice day, the frogs will come out of the water.
A. 放 B. 落 C. 游 D. 飞
【小题1】We can play beach soccer when birds ________.

A．fly in the sky	B．come back
C．play on the beach	D．B and C

【小题2】Where there is rain, frogs are not _________.

A．in the pool	B．out of the water
C．making a big noise	D．swimming in the water

【小题3】What’s the best title for the passage?

Birds live in the trees. Squirrels（松鼠） live in the trees. But do you know that some frogs（蛙） live in the trees, too?

The tree frog is hard to find. It can change colors. On green leaves, it stays green. On a brown branch（树枝）,it turns brown. Some tree frogs can change from green to gold（金黄色） or blue.

Tree frogs have legs and wide feet. They have sticky pads（黏性的肉趾） at the end of their toes. These sticky toe pads keep the tree frogs from falling off the trees. Tree frogs have different colors and markings（斑点） on their skins. Their eyes are different, too. Some have green eyes, and others have bright red ones.

The sounds they make are different, too. One frog makes a sound like a dog barking（狗吠）.Another frog makes a loud noise like a snore（打鼾）.There is even a frog that whistles（吹口哨）！

1. According to the passage, these frogs are hard to find because________.

A. they stay in trees?????????? B. they can change their colors

C. they have sticky pads?????? D. they make surprising sounds

2. The color of tree frogs on green leaves is________.

A. gold????????????? B. brown????????????? ????????????? C. green????????????? ????????????? D. blue

3.What sounds can the frogs make?

A. like a dog barking????????? B. like a snore

C. like a whistle????????????? D. A,B and C

4. Which of the following sentences is RIGHT?

A. The tree frogs have different colors and markings on their skins.

B. The tree frogs can’t make a loud noise like a snore.

C. We can easily tell tree leaves from tree frogs.

D. We still can’t find tree frogs if we hear a sound like a snore in the forest.

5. The passage is mainly about________.

A. the colors of a special frog??????? B. the sounds of a special frog

C. the eyes of a special frog????????? D. something about tree frogs

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. The Australian Rocket Frog can even jump over 2m, which is 50 times its body length (5.5 cm). 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.