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.
小題1:The earliest frogs lived about          million years ago.
A．20
B．30
C．50
D．190
小題2:      can jump over 2m.
A．The Goliath Frog
B．The Common Wood Frog
C．The Poison Frog
D．The Australian Rocket Frog
小題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.

小題1:D
小題2:D
小題3:B

試題分析：這篇短文重點介紹了世界上的各種青蛙，詳細的描述了他們的生理特點及生活習性。
小題1:根據(jù)第一段The earliest known frogs lived about 190 million years ago 描述，可知選D。
小題2:根據(jù)The Australian Rocket Frog can even jump over 2m, 描述，可知選D。
小題3:根據(jù)最后一段When the temperature goes down, they become ice frogs. 描述，可知選B。
點評：本文淺顯易懂，層次分明，學生很容易把握文章中心內(nèi)容。答題中注意帶著問題閱讀短文，一般就能順利找出答題依據(jù)。對于不能直接找到根據(jù)的問題注意聯(lián)系上下文，根據(jù)短文中心總結(jié)出正確答案。
練習冊系列答案
相關(guān)習題

科目：初中英語 來源：不詳 題型：完形填空

Pandas live in the forests and mountains of Southwest China. They mainly   1  bamboo, and each panda   2 a lot of bamboo every day. The area of bamboo is becoming smaller for many different   3 ,so pandas have  4  land to live  5  . Pandas don’t have many babies, and baby pandas often   6 . The situation is becoming very serious.
Our government is working hard to save pandas. There are more than 30 natures reserves to protect pandas but these are not enough. The government has made a new plan   7 pandas. The nature reserves will be bigger and the bamboo will grow 8  .Then the pandas will have enough food to eat and enough places to live in. Pandas born in the zoos may   9 live in the nature reserves.
Most people love pandas. The panda is one of the best-known   10  in the world. It is the symbol for the World Wide Fund for Nature.
小題1:
A．live inB．live onC．live forD．live at
小題2:
A．need eatingB．needs eatingC．need to eatD．needs to eat
小題3:
A．causesB．excuseC．reasonsD．result
小題4:
A．fewer and fewerB．more and more C．less and lessD．bigger and bigger
小題5:
A．onB．inC．a(chǎn)t D．into
小題6:
A．dyingB．dieC．deathD．dead
小題7:
A．helpB．helpingC．to helpD．helps
小題8:
A．wellB．betterC．badD．worse
小題9:
A．goes back B．go back toC．go backD．goes back to
小題10:
A．a(chǎn)nimalsB．a(chǎn)nimalC．a(chǎn)n animalD．the animals

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

What do you like? Different people like different things. Some people like loud music, other people don’t. They think it is too noisy. They like soft music. Many people like sports, but they do not like the same sports.
In some countries, cricket(板球) is a very popular sport. In others, it is not popular at all. No one plays it and few people watch it on TV. The World Cup is very popular. Millions of people watch the games on TV. Some people don’t like doing sports. They just like to watch other people playing.
Different people like different foods. Some people do not like meat. They eat most kinds of fruits and vegetables. Some people do not like potatoes and bread. They prefer rice or corn.
Not everyone like the same colors. Most people have a favorite color. Some people like bright colors. Others prefer pale colors. The world is an interesting place because we all like different things.
小題1:What’s the main idea of this passage?
A．People all like the same things.
B．Different people like the same things
C．People all like different sports
D．Different people like different things
小題2:Which sentence is true?
A．Everyone likes sports
B．Not many people like sports
C．Most people don’t like sports.
D．Lots of people like sports
小題3:How many people like to watch the World Cup on TV?
A．Few people
B．Hundreds of different people
C．Millions of people
D．No one at all
小題4:What do people who don’t like meat(不喜歡吃肉的人) eat?
A．Mostly(主要) potatoes and bread
B．Mostly fruits and vegetables
C．Mostly rice and corn
D．Mostly potatoes and corns
小題5:Which sentence is true?
A．Most people have a favorite color
B．No one likes bright colors.
C．Everyone likes bright colors
D．Few people prefer pale colors

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

閱讀短文，從方框中選擇適當?shù)木渥舆�原到短文中，使短文意思完整．
Scientists think that many or most animals can't see colors．小題1: ．To find out if dogs could see colors，scientists gave dogs food every time they played certain piece of music．  小題2: only when they heard this piece of music．They did not get ready to eat when they heard other pieces of music．
Then the scientists gave the dogs food every time they showed them a certain color．The dogs got ready to eat when they saw thi s color． 小題3: ．Again the dogs got ready to eat．The colors were al l the same to them．  小題4: ，however．For example if  we put food in a red box and do this every day．A monkey wiIi always go to the red box to get the food．  小題5: if we then put food in a blue box．

查看答案和解析>>

科目：初中英語 來源：不詳 題型：完形填空

Several days ago, some students from the US visited our school. When we talked, I found __1__ differences in school life between the US and China. For example, each class __2__fifty minutes in the US. It is a little__3_than that in China. We usually have forty-five minutes in each class. Another difference is that they have less break time between__4__. Besides, although most schools in both countries finish their__5__classes at 12 o’clock, the students in the US only have _6__break, so they need to eat lunch quickly. Their afternoon classes begin at 1:00 pm and school is over at __7__ 3:00 pm. Then they take part in club activities or play sports.
Many Chinese students don’t work during their high school years, __8__ the US students like to find a part-time job(兼職) in their free time. They don’t have a dream job in mind. They think __9__ is no difference between jobs. Working is a useful experience for them and they make money at the same time. Some of them even take one-year full-time jobs__10__they leave high school and then go to college.
小題1:
A．a(chǎn) littleB．littleC．a(chǎn) fewD．few
小題2:
A．hasB．finishesC．startsD．stays
小題3:
A．shorterB．longerC．earlierD．later
小題4:
A．schoolsB．classesC．mealsD．students
小題5:
A．dayB．nightC．morningD．a(chǎn)fternoon
小題6:
A．a(chǎn) hour-longB．a(chǎn)n hour longC．a(chǎn)n- hour- long D．a(chǎn)n hour-long
小題7:
A．a(chǎn)fterB．beforeC．duringD．a(chǎn)bout
小題8:
A．a(chǎn)lthoughB．whenC．butD．a(chǎn)nd
小題9:
A．itB．thereC．thatD．this
小題10:
A．a(chǎn)fterB．withC．whenD．during

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

材料A-D分別介紹了四本書的內(nèi)容?請根據(jù)Tom, Betty, Sophia, Jane的需求?幫助他們選出他們想讀的書并完成小題。
A. This book will help you understand how to stay well and avoid sickness. You’ll learn some things that you might use at home to avoid catching a cold.
B. This book has useful information about how to prevent common accidents. It’s about safety both indoors and outdoors.
C. This book will tell you something about how to keep healthy by doing exercises. You’ll learn not only the importance of doing exercises, but also the ways of doing exercises.
D. Do you have difficulties to communicate with others? Do you often say something wrong when you talk to others? This book will teach you how to say proper things to people.
小題1:Tom is collecting information about how to prevent electrical fire.
小題2:Betty is trying to advise her mother to do some sports.
小題3:Sophia wants to know some ways to avoid common cold.
小題4:Jane is studying talking strategies.
小題5:Kate wants to keep thinner and healthier. Maybe she can borrow the book from ______.
A．TomB．BettyC．SophiaD．Jane

查看答案和解析>>

科目：初中英語 來源：不詳 題型：完形填空

完形填空
Middle school days are both fun and busy. Students spend __1__their teachers. Students spend their days in class, ___2__to the interesting or boring words of their teachers. At break（休息時間）, they __3__ themselves by running or talking with each other. But ___4_should students spend their__5__time after school?
In western countries,___6_is normal(很正常的) for students to have a part-time _7_after school or on weekends. Students can make their _8_ money and learn more about the “__9_world”. They enjoy the independence（獨立） and money, and their parents enjoy the __10_house. However, it seems that, in China, parents__11__so much about their children’s studies that they would like to _12_ their children spending most of their time _13__for all those exams. It is natural for Chinese parents to feel that way, but I think everything should keep balanced. Sometimes, western school children__14__long hours after school to make money, so they__15__too tired to listen in class or do their homework. But Chinese students spend so much time on their studies that anything else becomes less important.
小題1:
A．inB．onC．withD．for
小題2:
A．a(chǎn)ddingB．gettingC．replyingD．listening
小題3:
A．helpB．takeC．relaxD．look
小題4:
A．whatB．howC．whenD．which
小題5:
A．busyB．littleC．pastD．free
小題6:
A．thisB．thatC．itD．such
小題7:
A．a(chǎn)ctivityB．jobC．programD．plan
小題8:
A．richB．a(chǎn)nyC．ownD．some
小題9:
A．realB．poorC．publicD．small
小題10:
A．bigB．quietC．noisyD．modern
小題11:
A．dealB．worryC．causeD．concentrate
小題12:
A．makeB．a(chǎn)skC．letD．see
小題13:
A．chattingB．studyingC．succeedingD．obeying
小題14:
A．spendB．solveC．regardD．work
小題15:
A．faceB．realizeC．a(chǎn)chieveD．become

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

Have you ever hoped a toy balloon? They are very light. But there are much bigger balloons can fly very high up in the sky. They are big enough to carry people. They are called hot-air balloons.
To make a hot-air balloon go up, turn on the burner(燃燒器). That will make the air inside the balloon hotter. Then the balloon will go up.
To make the balloon go down, turn off the burner. The air inside the balloon will get cooler. Then the balloon will go down. Underneath(在….下面) the balloon there is a large basket. That is where the pilot and the passengers go.
The burner is just above the basket. You can stand in the basket and turn the burner on and off. The balloon will go where the wind is blowing the right way! Do you want the balloon to go somewhere special? First make sure the wind is blowing the right way!
People have been flying in hot-air balloons for over two hundred years. Before planes it was the only way of flying. Today people fly in hot-air balloon for fun. Some people like to race hot-air balloons.
小題1:A hot-air balloon is ____
A．smaller than a toy balloonB．bigger than a toy balloon
C．the same as a toy balloonD．lighter than a toy balloon
小題2:Where will you sit if you want to fly in the balloon?
A．Inside the basket B．On top of the balloon
C．Under the basketD．Inside the balloon
小題3:You want the balloon to go up. So you will ____
A．jump out of the balloon
B．let the air out of the balloon
C．make the air inside the balloon hotter
D．let the air inside the balloon cool down
小題4:Now you are high up in the sky. If you want the balloon go down, you will _____
A．make your friends go out of the basket
B．make a hole in the balloon with a knife
C．make the air inside the balloon hotter
D．make the air inside the balloon cooler
小題5: Now everything is all right! The balloon is flying across the sky. Where are you going?
A．Towards the sunB．To the seaside
C．Where the wind blows you.D．To the nearest mountains

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

Timetables are important. They help you know what your classes are and when your classes are. They help you get to your classes on time. A class timetable has the names and time of all classes. A good timetable has other information(信息) too. You can write your teachers’names on it. In some schools, students have the same class in the same place every day—from Monday to Friday. The following timetable is fit(合適的) for those students.
Time
Monday
Tuesday
Wednesday
Thursday
Friday
7:50
Meeting
Meeting
Meeting
Meeting
Meeting
8:20
Chinese
English
Maths
English
Chinese
9:05
Morning Exercises
9:30
Maths
Chinese
English
Chinese
Maths
10:25
 
Maths
Chinese
Maths
PE
11:45
Lunch
12:45
History
Music
PE
Music
English
13:30
PE
Art
History
Art
History
14:15
Biology
Geography
Biology
Geography
Meeting
15:00
 
Chinese : Mr Li       Maths: Ms Feng          English: Mr Black       
History: Mr Ge       Geography: Mr Jiang      Biology: Miss Song        
Art : Mr Xu       Music: Mr Hu       PE :Ms Wang    Meeting: Ms Feng
小題1:Why do we say the timetables are important?
A．Because they can help us do the homework well.
B．Because they can help us know about out subjects.
C．Because they can help us know a lot about our classmates.
D．Because they can help us know a lot about our teachers.
小題2:What does the timetable include(包括)?
a. the names of the subjects
b. the time of all classes
c. the classroom
d. the teachers’ names
e. the workdays of a week
A．a(chǎn) c d e B．a(chǎn) b c e C．a(chǎn) b d e D．a(chǎn) b c d e
小題3:What class are the students having at 10:30 on Wednesday?
A．PEB．MathsC．EnglishD．Chinese
小題4:How many classes does Ms Feng have on Friday?
A．OneB．TwoC．ThreeD．Four
小題5:Which of the following is Not right?
A．The students have an hour for lunch.
B．The students have seven lessons a day.
C．The students go to school five days a week.
D．The students do morning exercises and play ball games every day.

查看答案和解析>>

同步練習冊答案