题目内容

_ __ __, I have to put it away and focus my attention on study this week.

A. However the story is amusing

B. No matter amusing the story is

C. However amusing the story is

D. No matter how the story is amusing

C

【解析】

试题分析:考查让步状语从句。因为本句中的形容词amusing,所以前面要使用however来修饰。且amusing要紧跟在however的后面。however或者no matter how都可以表示让步,且使用陈述的语序。句意:这个星期无论这个故事多么有趣,我都要把它放在一边,用心学习。故D。

考点:考查让步状语从句

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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 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 least common 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.

1.Which of the following shown the correct relationships in blood transfusions?

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

While Jennifer was at home taking an online exam for her business law class, a monitor(监控器) a few hundred miles away was watching her every move.

Using a web camera equipped in Jennifer’s Los Angeles apartment, the monitor in Phoenix tracked how frequently her eyes moved from the computer screen and listened for the secret sounds of a possible helper in the room. Her Internet access was locked---remotely---to prevent Internet searches, and her typing style was analyzed to make sure she was who she said she was; Did she enter her student number at the same speed as she had in the past? Or was she slowing down?

In the battle against cheating, this is the cutting edge and a key to encourage honestly in the booming field of on line education. The technology gives trust to the entire system, to the institution and to online education in general. Only with solid measures against cheating, experts say, can Internet universities show that their exams and diplomas are valid---that students haven’t searched the Internet to get the right answers.

Although online classes have existed for more than a decade, the concern over cheating become sharper in the last year with the growth of “open online courses.” Private colleges, public universities and corporations are jumping into the online education field, spending millions of dollars to attract potential students, while also taking steps to help guarantee honesty at a distance.

Aside from the web cameras, a number of other high-tech methods are becoming increasingly popular. Among them are programs that check student’s identities using personas information, such as the telephone numbers they once used.

Other programs can produce unique exams by drawing on a large list of questions and can recognize possible cheaters by analyzing whether difficult test questions are answered at the same speed as easy ones. As in many university classes, term papers are scanned against some large Internet data banks for cheating.

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3. Some programs can find out possible cheaters by_________.

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B. producing a large number of questions

C. scanning the Internet test questions

D. giving difficult test questions

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