When we donate（捐献）blood, a small amount is usually taken in advance for at least ABO and Rh systems typing．If you are O+, the O is your ABO type and the + is your Rh type．It is possible to be A, B, AB, or O as well as Rh + or Rh-．
The ABO system was discovered by Karl Landsteiner in the early 1900s．He was awarded the Nobel Prize for his achievements．There are four basic types of blood in the ABO system: A, B, AB and O．Everybody is born with one of these four types of blood．We get blood type, just like hair color and height from parents．Because of the substances (物质) contained in each type, the four groups must be transfused carefully．If two different blood types are mixed together, it may put a person into an extremely dangerous situation．Basically, A and B cannot be mixed．A and B cannot receive AB, but AB may receive A or B．In an emergency, type O blood can be given because it is most likely to be accepted by all blood types，so it is often called the universal donor．However，there is still a risk．For the opposite reason，AB is sometimes called the universal receiver．However，because there can be so many reactions in transfusions，patients usually receive only salt until their blood can be matched as exactly as possible in the blood bank of the hospital．
There is a relationship between your blood type and your nationality．Among the Europeans, about 45 percent have type O while 42 percent have type A．The rarest is type AB．Other races have different percentage．For example, some American Indian groups have nearly 100 percent type out of 100 donors in the world…
|
84 donors are Rh+ |
16 donors are Rh- |
|
38 are O+ |
7 are O- |
|
34 are A+ |
6 are A- |
|
9 are B+ |
2 are B- |
|
3 are AB+ |
1 is AB- |
1.Which of the following shown the correct relationships in blood transfusions?
A． B． C． D．
2.The underlined word “transfuse” most probably means __________．
A．to put the blood into a container
B．to move the blood from one place to another
C．to put the blood of one person into the body of another
D．to give power to another person
3.The writer suggests that the third most common blood type among the Europeans is _______.
A．B B．A C．AB D．O
4.The text mainly tells us ___________．
A．about the basic types of human blood
B．what kind of blood is the most common
C．about Karl Landsteiner who won the Nobel Prize
D．the relationship between blood type and nationality
I start to wonder what else had changed since I’d been gone． My parents are in an awkward transition, wondering how to treat me now． They wrestle with whether to treat me—still their daughter—as one of them, an adult, or as the child they feel they sent away months earlier.
I run into two of my best friends from high school; we stare at each other, expressionless．We ask the simple questions and give simple answers． It’s as if we have nothing to say to each other． I wonder how things have changed so much in such a small amount of time． We used to laugh and promise that no matter how far away we were, our love for each other would never change． Their interests don’t interest me anymore, and I find myself unable to relate my life to theirs.
I had been so excited to come home, but now I just look at it all and wonder: Is it me?
Why hadn’t the world stood still here while I was gone? My room isn’t the same, my friends and I don’t share the same bond, and my parents don’t know how to treat me—or who I am, for that matter.
I get back to school feeling half-fulfilled, but not disappointed． I sit up in my bed in my dorm room, surrounded by my pictures, dolls． As I wonder what has happened, I realize that I can’t expect the world to stand still and move forward at the same time． I can’t change and expect that things at home will stay the same． I have to find comfort in what has changed and what is new; keep the memories, but live in the present.
A few weeks later, I’m packing again, this time for winter break． My mom meets me at the curb． I have come home accepting the changes, not only in my surroundings, but most of all in me.
1.What can we infer about the writer?
A．She is a high school student. B．She is a college student.
C．She is a clerk in a school. D．She is a traveler.
2.What surprises the writer most?
A．The living conditions of her parents.
B．The decorations in her room.
C．The meeting with her best friends.
D．The things still staying the same.
3.What is this passage mainly about?
A．The writer’s curiosity about the changes.
B．The changes in the writer’s surroundings and in herself.
C．The writer’s disappointment about the changes.
D．The writer’s unwilling accepting of the changes.
阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。
The winter skies are grey and it’s cold outside．The nights come early and we spend a lot more time __1__ and alone．Many people __2__ winter: so cold, so dark, so boring．But I like winter because I have more time to read.
For many students reading means school; it means __3__．Reading is something your teacher assigns and it’s something you’re __4__．Reading is something you have to do, not something you want to do．But for me and many other people, reading is the most __5__ thing we can imagine．Getting lost in a good book can __6__ a cold winter evening disappear．Dull grey skies are no __7__ for the fantastic adventures of Frodo in The Lord of the Rings《指环王》or for romantic trouble-making of Jane Austen’s Emma《爱玛》, or for the youthful problems of Holden Caulfield in The Catcher in the Rye《麦田守望者》.
All of those books are studied in North American high schools．They are interesting and well written books that __8__ young people．__9__, even there, many high school students don’t enjoy reading the books because they are __10__ their school work: “Oh, my God! Two hundred pages! I’ll never be able to read __11__ much.” But sometimes a funny thing happens．They begin to read and they begin to follow the __12__．Suddenly, the world inside the book becomes more exciting and more wonderful than the world they __13__．At the moment the thought __14__ reading is work disappears and reading becomes __15__.
Reading anything is __16__ but reading good books is a terrific (极好的) way to improve your English．Good writers write English very well and __17__ you with good examples to follow．And good books will tell you more about English __18__: what people think, how they talk, how they interact with each other．But don’t let me __19__ it by telling you that reading is good for you．Just think of it as a good way to __20_ on a cold winter evening.
1.A．indoors B．indoor C．outdoors D．outside
2.A．like B．prefer C．hate D．love
3.A．job B．worry C．try D．work
4.A．checked B．tested on C．examined D．based on
5.A．enjoyable B．reasonable C．comfortable D．considerable
6.A．want B．cause C．make D．force
7.A．contest B．challenge C．competition D．match
8.A．appeal to B．respond to C．react to D．reply to
9.A．Fortunately B．eventually C．Unfortunately D．Accidentally
10.A．free from B．part of C．in place of D．far from
11.A．not B．very C．this D．that
12.A．story B．subject C．idea D．theme
13.A．leave for B．care about C．flee from D．live in
14.A．what B．that C．this D．which
15.A．a comfort B．a failure C．a success D．a pleasure
16.A．bad B．mean C．great D．grand
17.A．provide B．offer C．give D．award
18.A．custom B．language C．culture D．art
19.A．break B．spoil C．make D．develop
20.A．keep warm B．stand still C．stay calm D．stay cool
A computer ______ think for itself．It is programmed to carry out instructions only.
A．can’t B．may not C．won’t D．shouldn’t
---He was born and grew up in a remote mountain village in Shangdong province．
---_____ he speaks English with a Shangdong accent．
A．No doubt B．No wonder C．No problem D．No way
He has written many fiction stories, _____ this is only an example．
A．among which B．for which C．of which D．by which
