C
What is blood? It is the red liquid which comes out of your finger when you cut it. There are bout thirteen pints(品脱) of blood in a man' s body. He can give a pint of blood at a time to
blood bank for the use of other men who may need it. A healthy body makes up one pint of bloo
quickly.
What does our blood do for us? It takes food to all parts of our bodies and takes waste awa
from them. All the parts of our bodies are made up of cells, and these cells, which are very small
all need food all the time.
The blood is like a stream. The cells take what they need out of the blood stream, as plants an fishes take their food out of water. The blood stream carries food and oxygen which it has taken up our lungs to all the cells in the body.
What makes the blood go on moving round the body in a stream? The heart sends it round.
man' s heart is about the Size of his fist. The heart is a pump. It has rooms in it with doors betwee
them. It pumps blood in and out through these doors by changing the size of the rooms so that th
doors open and shut.
The heart keeps stream of blood going all round the body and back again to itself. Everywhel the blood stream does two things: supplies the cells with food and oxygen and takes away the waste It is as if the blood kept the little fires in the cells burning and took away the ashes.
49. Blood is the_____
A. red liquid which comes from your finger    B. red liquid which we can see
C. red liquid which flows in a man's body     D. red cell
50. The blood in a man' s body__________.
A. makes food all the time
B. takes food to all cells in the body and takes waste away
C. supplies the cells with food and oxygen from them
D. takes waste away from the cells
51. __ makes the blood go on moving round the body in a stream.
A. The heart          B. The lung          C. The cell          D. The pump
52. This article tells us about__________.
A. a stream of blood                        B. the use of the heart
C. a wonderful pump                       D. something about blood

C

What is blood? It is the red liquid which comes out of your finger when you cut it. There are bout thirteen pints(???) of blood in a man' s body. He can give a pint of blood at a time to

blood bank for the use of other men who may need it. A healthy body makes up one pint of bloo

quickly.

What does our blood do for us? It takes food to all parts of our bodies and takes waste awa

from them. All the parts of our bodies are made up of cells, and these cells, which are very small

all need food all the time.

The blood is like a stream. The cells take what they need out of the blood stream, as plants an fishes take their food out of water. The blood stream carries food and oxygen which it has taken up our lungs to all the cells in the body.

What makes the blood go on moving round the body in a stream? The heart sends it round.

man' s heart is about the Size of his fist. The heart is a pump. It has rooms in it with doors betwee

them. It pumps blood in and out through these doors by changing the size of the rooms so that th

doors open and shut.

The heart keeps stream of blood going all round the body and back again to itself. Everywhel the blood stream does two things: supplies the cells with food and oxygen and takes away the waste It is as if the blood kept the little fires in the cells burning and took away the ashes.

49. Blood is the_____

A. red liquid which comes from your finger    B. red liquid which we can see

C. red liquid which flows in a man's body     D. red cell

50. The blood in a man' s body__________.

A. makes food all the time

B. takes food to all cells in the body and takes waste away

C. supplies the cells with food and oxygen from them

D. takes waste away from the cells

51. __ makes the blood go on moving round the body in a stream.

A. The heart          B. The lung          C. The cell          D. The pump

52. This article tells us about__________.

A. a stream of blood                        B. the use of the heart

C. a wonderful pump                       D. something about blood

B

It is natural that children are curious about the world around them. For example, they want to know how their hearts beat. They want to know why the ocean water tastes salty.

　　As children grow up, they become curious about different kinds of things. When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers. They become interested in the physical world around them: the plants, the animals, the sky. Later, they become interested in the things that people have made: wheels, bicycles, cars. And when they are adults, their curiosity continues. Sometimes this curiosity leads to a career (生涯、职业) in science.

　　Scientists spend their lives trying to find out about the world．Those who work with the earth sciences study the earth, the oceans, and the skies. Other scientists who study living things work with the biological sciences. A third group of scientists study the physical sciences, e. g. physics, chemistry .

　　These scientists have already discovered a lot about our world．For example, they tell us why your heart beats fast when you run. They say that when you are quiet, your heart normally beats sixty-five or seventy-five times a minute. Your heart is a pump (泵) that pumps blood to all parts of the body. The blood carries oxygen and nutrition. When you run, your muscles work very hard and use the nutrition that the blood carries to them. The muscles need oxygen, too . So your brain sends a signal to the heart. The signal means that the muscles need more nutrition and oxygen. Then the heart beats fast and sends blood quickly to the muscles. It may beat 90 to 140 times a minute.

　　Of course, scientists cannot answer all of our questions. If we ask, “Why does the ocean water taste salty” scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask , “What happens to the salt in the ocean? The ocean does not get saltier every year.” Scientists are not sure about the answer to this question.

　　We know a lot about our world, but there are still many answers that we do not have, and we are curious.

45．According to the passage, which of the following statements is true?

　  A．People are curious in the same way.

　  B．People in different countries are interested in different things.

　  C．Men and women are curious about different things.

　  D．People of different ages are interested in different things

46．Scientists who work with the biological sciences study____.

A．the earth , the oceans and the sky          B．man-made things

C．plants and animals                               D．ocean water

47．When you run, your muscles need ____.

A．more nutrition and oxygen    B．more signals    C．more salt   D．water

48．A rock cracks _____.

A．in wet regions                                     B．in dry regions

C．at very high or very low temperatures               D．when salty water falls in

D

These days, if you still think the cell phone is just for talking, you’ll get laughed at. Yes, it’s true, voice-only handsets have become out of date. Today’s do-it-all mobiles have a lot in common with the computer. The only difference may be that they fit in your pocket and you pay by the minute to use them. Some of the things a cell phone can do for you will be available this year:

Surf at speed  

Cell phones that let you use the Web have been around for years. So, what’s new? Well, faster third-generation（3G）networks that let you surf at anywhere. This then allows a carrier to send video, music, and games to your phone. Possible choices are from LG Electronics VX 8000 and Motorola V1150.

Listen as you go

The problem with most cell phone MP3 players is that they hold only a handful of songs. But, that’s about to change. Sony Ericsson’s new W800i can hold around 150 songs in its 500 MB memory. And Samsung’s SPH-V5400 even comes with a 1.5 GB hard drive. Mobile phones may eventually replace mini-MP3 players, especially for teens.

Say cheese

Camera cell phones are not new either. But, most of them have limitations: around 1-megapixel（百万像素）. But new technology has made 2-megapixel units more common, and 3-megapixel units are showing up soon. Some 2-megapixel models, like Sony Ericsson’s K750i, offer limited zoom and focus controls. Others, like LG’s recent A7110, can even capture 30 minutes of full-motion video.

Portable TV

You say you like “watching TV”? That’s what Samsung MM-A700 wants to give you. The new model lets users watch popular TV programmes— for a fee. Other choices are Nokia’s 6620, Sanyo’s MM7400 and NEC’s N940. The NEC model lets you watch public TV— no fee.

The above are just a handful of what you’ll see in the coming months. Further down the road, your mobile phone may play a host of other roles, such as mobile credit card, position locator... So what is there that a cell phone can’t do?

53. Which of the following models should you choose to listen to the music?

A. Samsung’s SPH-V5400 and Nokia’s 6620.

B. Sanyo’s MM7400 and NEC’s N940.

C. Sony Ericsson’s W800i and NEC’s N940.

D. Sony Ericsson’s W800i and Samsung’s SPH-V5400.

54. What’s the difference between NEC’s N940 and other models?

A. It allows you to surf the Internet at a high speed.

B. It lets you watch public TV for free.

C. It can hold as many as 150 songs.

D. It can capture 30 minutes of full-motion video.

55. Which of the following statements is TRUE according to the passage?

A. Camera cellphones of 3-megapixel units will appear soon.

B. It is certain that a cellphone can do anything in the near future.

C. Today’s do-it-all mobiles have nothing in common with the computer.

D. All the functions of the models mentioned in the passage are completely new.

56. This passage may be ________.

A. a survey to find the development of cellphones

B. an introduction to some new models of cellphones

C. a science fiction trying to attract readers’ attention

D. an advertisement trying to persuade you to buy new cellphones

 B

It is natural that children are curious (好奇的) about the world around them. For example, they want to know how their hearts beat. They want to know why the ocean water tastes salty.

　As children grow up, they become curious about different kinds of things. When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers. They become interested in the physical world around them: the plants, the animals, the sky. Later, they become interested in the things that people have made: wheels, bicycles, cars. And when they are adults, their curiosity continues. Sometimes this curiosity leads to a career (生涯、职业) in science.

　Scientists spend their lives trying to find out about the world．Those who work with the earth sciences study the earth, the oceans, and the sky. Other scientists who study living things work with the biological sciences. A third group of scientists study the physical sciences, e. g. physics, chemistry .

　These scientists have already discovered a lot about our world．For example, they tell us why your heart beats fast when you run. They say that when you are quiet, your heart normally beats sixty-five or seventy-five times a minute. Your heart is a pump (泵) that pumps blood to all parts of the body. The blood carries oxygen and nutrition. When you run, your muscles work very hard and use the nutrition that the blood carries to them. The muscles need oxygen, too . So your brain sends a signal to the heart. The signal means that the muscles need more nutrition and oxygen. Then the heart beats fast and sends blood quickly to the muscles. It may beat 90 to 140 times a minute.

　Of course, scientists cannot answer all of our questions. If we ask, “Why does the ocean water taste salty” scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask , “What happens to the salt in the ocean? The ocean does not get saltier every year.” Scientists are not sure about the answer to this question.

　We know a lot about our world, but there are still many answers that we do not have, and we are curious.

55．According to the passage, which of the following statements is true?

　   A．People are curious in the same way.

　   B．People in different countries are interested in different things.

　   C．Men and women are curious about different things.

　   D．People of different ages are interested in different things

56．Scientists who work with the biological sciences study____.

       A．the earth , the oceans and the sky   B．man-made things

       C．plants and animals   D．ocean water

57．When you run, your muscles need ____.

A．more nutrition and oxygen  B．more signals   C．more salt  D．water

58．People are always curious because ____.

A．they cannot explain many things    B．they know nothing about the world

C．they know little about the world    D．they want to be scientists