日日人人_亚洲美女在线视频_av手机在线播放_国产大片aaa_欧美中文日韩_午夜理伦三级

In the past, man did not have to think about the protection of his environment．There were few people on the earth, and natural resources seemed to be enough.

　　 Today things are　 36　 , the world has become too crowded. We are using up our natural resources too quickly and at the same time we are polluting our environment with dangerous chemicals. If we keep doing this, human life on the earth 　 37　 survive(生存）.

　　 Everyone realizes today that if 　 38　 fishes are taken from the sea, there will soon be none left. Yet, with modern fishing ways, more and more fishes are caught. We know that if lots of trees are cut down, forests will disappear and nothing will grow on the earth. Yet we　 39　 to use bigger and more powerful machines to cut down trees.

　 We realize that if rivers 　 40　 with waste products from factories, fish will die.　 41　 , in most countries wastes are still put into rivers or into the sea.

We know, too, that if the　 42　 of the world keep on rising at the present rate, in a few years there will not be enough food. What can we do to solve these problems? If we eat 　 43　 , there will be more food for everyone．Land that is used to grow crops feeds　 five times more people than land where animals are kept．

　 Our natural resources will　 44　 longer if we learn to recycle them．

　 Finally, if we educate people to think about the problems, we shall have a better and cleaner　 45　 in the future.

36. A. common 　　B. the same 　　C. changeable 　　D. different

37. A. may not 　　B. will not 　　 C. shall not 　　　 D. could not

38. A. too many　　 B. many too　　 C. too much　　　 D. much too

39. A. continue 　　B. have 　　　C. ought 　　　D. decide

40. A. pollute　　 　B. will pollute　 　C. are polluted 　　　D. are polluting

41. A. And 　　　　B. However 　　　C. Generally 　　　D. Therefore

42. A. production 　　B. pollution 　　 C. population 　　D. Development

43. A. more vegetables and less meat　　　 B. less vegetables and more meat

　 C. more vegetable and more meat　　　 D. less vegetable and less meat

44. A. use 　　 B. stay 　　　C. keep 　　　 D. last

45. A. nature 　　　B. sea 　　 C. planet 　　　D. forest

A person has been badly injured in a car accident. It is necessary to give him a transfusion (輸血) because he has lost much blood in the accident. However, special care must be taken in selecting new blood for him. If the blood is too different from his own, the transfusion can kill him.
There are four basic blood groups: A, B, AB and O. A single test can tell us a person’s blood group. Everybody is born with one of these four blood groups. People’s blood group, like hair colour, is inherited (繼承) from parents.
Because the substances contained in each group are different, transfusion must be given carefully. Basically, A and B cannot be mixed. A and B cannot receive AB, but AB may receive A or B. O can be given to any other group, so it is often called the universal donor. On the contrary, AB is sometimes called the universal recipient (接受者). However, before being given the transfusion, patients usually receive only salt or plasma (血漿) until their blood can be matched as exactly as possible. In this way, it is possible to avoid any bad results of the transfusion.
There is a relationship between our blood groups and our nationalities. Among the Europeans, about 42 percent are blood group A while 45 percent are blood group O. The rarest is blood group AB. However, some American Indian groups are nearly 100 percent blood group O.
【小題1】Which of the following shows the correct relationship in blood transfusion? (→ =" giving" blood to)

【小題2】Usually, before being given a transfusion, ________.

A person has been badly injured in a car accident. It is necessary to give him a transfusion (輸血) because he has lost much blood in the accident. However, special care must be taken in selecting new blood for him. If the blood is too different from his own, the transfusion can kill him.

There are four basic blood groups: A, B, AB and O. A single test can tell us a person’s blood group. Everybody is born with one of these four blood groups. People’s blood group, like hair colour, is inherited (繼承) from parents.

Because the substances contained in each group are different, transfusion must be given carefully. Basically, A and B cannot be mixed. A and B cannot receive AB, but AB may receive A or B. O can be given to any other group, so it is often called the universal donor. On the contrary, AB is sometimes called the universal recipient (接受者). However, before being given the transfusion, patients usually receive only salt or plasma (血漿) until their blood can be matched as exactly as possible. In this way, it is possible to avoid any bad results of the transfusion.

There is a relationship between our blood groups and our nationalities. Among the Europeans, about 42 percent are blood group A while 45 percent are blood group O. The rarest is blood group AB. However, some American Indian groups are nearly 100 percent blood group O.

1.Which of the following shows the correct relationship in blood transfusion? (→ =" giving" blood to)

2.Usually, before being given a transfusion, ________.

A．a(chǎn) person needs to receive salt or plasma first

B．a(chǎn) person needs to have a good rest

C．a(chǎn) person needs to have a lot of food and water

D．a(chǎn) person needs to find the person with the same blood group as him

3.The third most common blood type among the Europeans is _______.

A．A                B．B                C．AB               D．O

4.Which is NOT right according to the passage?

A. A person’s blood group depends on his parents.

B. There is only one kind of blood group in a person’s body.

C. About 13 percent of the Europeans have blood group AB.

D. Most of American Indians can be universal blood donors.

5.Which is the best title for the passage?  

A．Blood transfusion                       B．Blood groups

C．Car accidents                          D．Blood group and nationalities

   Fox is an eight-year-old boy．He is a good boy．He does 36    in all his lessons. He37    school and he is always active(活潑的)in class．Every time the teacher asks a question，F(xiàn)ox always 38     his hand quickly．Sometimes his answer is 39      ，but the teacher always smiles(微笑)and says，“Good，F(xiàn)ox．But 40       a better answer to my question?”

    One day，the teacher asks the boys and girls a question．“Swallows(燕子)fly to the south  before winter 41    ，”he says．”But why don’t cats and dogs do 42     ?”Fox lifts(舉) his 43      as usual．“Yes，F(xiàn)ox?”says the teacher 44    ．Fox stands(站)up and says，“45    they have no wings(翅膀)．”

1．A．good              B．hard             C．well               D．bad

2．A．loves              B．likes a           C．goes to a        D．hates

3．A．gets up           B．puts on         C．gets on           D．puts up

4．A．right               B．wrong          C．easy                      D．hard

5．A．has                B．is there         C．a(chǎn)re there        D．have

6．A．will come         B．is coming        C．comes            D．is going to come

7．A．different           B．these           C．the same        D．with

8．A．hand              B．head             C．foot               D．eye

9．A．happy             B．glad              C．happily            D．a(chǎn)ngrily

10．A．Why             B．Because         C．That                      D．Where