题目内容
A container weighs more after air is put in, ____proves that air has weight.
- A.as
- B.it
- C.that
- D.which
考查连词。which 引导非限制性定语从句,修饰整个主句的内容,这时不能用that。
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 A B A B A B
AB O AB O AB O AB O
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 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
Packaging is an important form of advertising.A package can sometimes motivate someone to buy a product.For example, a small child might ask for a breakfast food that comes in a box with a picture of a TV character.The child is more interested in the picture than in breakfast food.Pictures for children to color or cut out, games printed on a package, or a small gift inside a box also motivate many children to buy products or to ask their parents to buy for them.
Some packages suggest that a buyer will get something for nothing.Food products sold in reusable containers are examples of this.Although a similar product in a plain container might cost less, people often prefer to buy the product in a reusable glass or dish, because they believe the container is free.However, the cost of the container is added to the cost of the product.The size of a package also motivates a buyer.Maybe the package had “Economy Size” or “Family Size” printed on it.This suggests that the larger size has the most product for the least money.But that is not always true.To find it out, a buyer has to know how the product is sold and the price of the basic unit.
The information on the package should provide some answers.But the important thing for any buyer to remember is that a package is often an advertisement.The words and pictures do not tell the whole story.Only the product inside can do that.
【小题1】From the passage we know the buyer pays more attention to __________.
A.the size of a container |
B.a container with attractive picture |
C.a well-designed container |
D.a plain container with low cost |
A.It’s not good to buy the product which is sold in a glass or dish. |
B.The quality of a container has nothing to do with the quality of the product. |
C.The best choice for a buyer is to buy a product in a plain package. |
D.A buyer should buy what he needs most rather than a well-designed package. |
A.How to Package a Product. |
B.How to Make an Advertisement. |
C.How to Sell Product. |
D.How to Treat the Package Wisely. |