题目内容
B.get running
C.run
D.get to run
When we donate blood, a small amount is usually taken in advance for at least ABO and Ph 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 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 O 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- |
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 K^S*5U.C#O
C. to put
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
If you ask some people, “How did you learn English so well?” you may get a surprising answer: “In my sleep!”
These are people who have taken part in one of the recent experiments (实验) to test “the learn while you sleep” method (方法), which is now being tried in several countries, and with several subjects. English is among them.
Scientists say that this sleep study method greatly speeds language learning. They say that the ordinary person can learn two or three times as much during sleep as in the same period during the day—and this does not affect (影响) his rest in any way. However, sleep teaching will only put into your head what you have studied already while you are awake.
In one experiment, ten lessons were broadcast over the radio for two weeks. Each lesson lasted twelve hours — from 8 p.m. to 8 a.m. The first three hours of English grammar and vocabulary (词汇) were given with the students awake. At 11 p.m. a lullaby (催眠曲) was broadcast to send the student to sleep and for the next three hours the radio in a soft and low voice broadcast the lesson again into his sleeping ears. At 2 a.m. a sharp noise was sent over the radio to wake the sleeping student up for a few minutes to go over the lesson. The soft music sent him back to rest again while the radio went on. At 5 o’clock his sleep ended and he had to go through the lesson again for three hours before breakfast.
【小题1】In the experiment, lessons were given____ .
| A.in the night time | B.after lullabies were broadcast |
| C.while the student was awake | D.all through the twelve hours |
| A.get up and take breakfast |
| B.be woken up by a loud voice |
| C.listen to the lesson again in sleep |
| D.review (复习) the lesson by himself |
| A.the English language | B.grammar and vocabulary |
| C.a number of subjects | D.foreign languages |