大学英语2 练习题(5)

大学英语

lost a great deal of blood in the accident. However, special care must be taken in selecting new blood for you. If the blood is too different from your own, the transfusion could kill you.

There are four basic types of blood: A, B, AB, and O. A simple test can indicate a person’s blood type, which, like hair color and height, is inherited from parents.

Because of substances contained in each type, the four groups must be transfused carefully. Basically, A and B cannot be mixed. A and B can’t receive AB, but AB may receive A or B. O can give to any other group; hence, it is often called the universal donor. For the opposite reason, AB is sometimes called the universal recipient. However, because so many reactions can occur in transfusions, patients usually receive only salt or plasma (liquid) until their blood can be matched as exactly as possible in the blood bank of a hospital. In this way, it is possible to avoid any bad reactions to the transfusion.

There is a relationship between your blood type and your nationality. Among Europeans and people of European ancestry, about 42 percent have type A while 45 percent have type O. The rarest is type AB. Other races have different percentages. For example, some American Indian groups have nearly 100 percent type O.

61. A good title for this passage is .

A) Getting Blood and Plasma B) Special Blood Types

C) Human Blood Types D) The Blood Bank of a Hospital

62. The word ―hence‖ in line 9 means .

A) always B) often C) therefore D) seldom

63. In a blood transfusion, it is easiest to find the acceptable type of blood for a person with the blood type of .

A) A B) B C) AB D) O

64. The purpose of using salt and plasma before a blood transfusion is to allow time .

A) to test the reactions to the transfusion

B) for matching the blood to be transfused with the patient’s blood

C) for the blood to be delivered from the blood bank

D) to select a new type of blood for the patient

65. Most Europeans have blood type .

A) A B) B C) O D) A or O

Passage Four

Jee Hock and Meng Kim were very good friends. Jee Hock could not see. He was blind. Meng Kim could not walk. He was lame. They lived in a village near a forest. Everyone in the village was going to a rich man's dinner on the other side of the forest. Jee Hock and Meng Kim were anxious to attend the dinner too. Blind Jee Hock thought of a plan. He would carry Meng Kim. The lame man could tell him the way. Meng Kim said that the plan was a good one. On the way through the forest, Meng Kim saw a tiger.He did not tell Jee Hock about it. Instead, he quietly asked Jee Hock to carry him to the nearest tree. Upon reaching an over banging branch, Meng Kim quickly hauled himself up. Then the tiger roared. Jee Hock at once knew a tiger was near. He lay down quietly. The tiger came to him and sniffed his body. The tiger's whiskers touched Jee Hock's nose. At once Jee Hock sneezed, "Ah Choooooo!" The tiger was afraid and ran away. Then Meng Kim came down from the tree. He asked Jee Hock about the tiger. Jee Hock said that the tiger told him to choose his friends wisely.