题目内容
(血管), delivering essential elements, and removing harmful wastes. Without blood, the human body would
stop working.
Blood is the fluid of life, transporting oxygen from the lungs to body tissue and carbon dioxide from body
tissue to the lungs. Blood is the fluid of growth, transporting nourishment from digestion and hormones from
glands (腺) throughout the body. Blood is the fluid of health, transporting disease fighting substances to the
tissue and waste to the kidneys (肾脏).
Because it contains living cells, blood is alive. Red blood cells and white blood cells are responsible for
nourishing and cleansing the body. Since the cells are alive, they too need nourishment. Vitamins and Minerals
keep the blood healthy. The blood cells have a definite life cycle, just as all living organisms do.
About 55 percent of blood is plasma (血浆), a straw-coloured clear liquid. The liquid plasma carries the
solid cells and the platelets (血小板), which help blood clot. Without blood platelets, you would bleed to death.
When the human body loses a little bit of blood through a minor wound, the platelets cause the blood to
clot so that the bleeding stops. Because new blood is always being made inside of your bones, the body can
replace the lost blood. When the human body loses a lot of blood through a major wound, that blood has to
be replaced through a blood transfusion from other people.
But everybody's blood is not the same. There are four different blood types. Plus, your blood has Rh
factors, which make it even more unique. Blood received through a transfusion must match your own.
Patients who are scheduled to have major surgery make autologous blood donations (donations of their own
blood) so that they have a perfect match.
B. remove harmful wastes from the body
C. absorb oxygen from the air to body tissue
D. move carbon dioxide from body tissue to the lungs
B. Growth.
C. Health.
D. Waste.
B. It carries the solid cells and the platelets.
C. It gives the blood cells a definite life cycle.
D. It helps the blood clot so that the bleeding stops.
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 阅读理解. | ||||||||||||
| Advertising is a form of communication that uses all kinds of media, and is visible everywhere these days. Typical customers of advertising companies are other companies, or businessmen, who want to persuade potential customers to buy more of what they make or sell. But there are other kinds of customers. Some organizations spend large sums of money on advertising a political party or other group that sells what is not, strictly speaking, a product or service. Such non - profit organizations are not typical advertising customers, and they prefer ways of spreading knowledge, changing attitudes, and improving society. Many advertisements are designed to increase sales of products and services by either improving brand image or, in the case of non - profit organizations, expressing ideas. In order to achieve th~s, advertisements will often pass on truthful information while delivering their messages. Every major medium is a means of delivering these messages, including television, radio, cinema, magazines, newspapers, video games, the Internet and billboards (大幅广告牌). Advertising will usually be created and. placed by an advertising agency on behalf of company or other organization. Spending on advertising has increased greatly in recent years. In 2006, spending was estimated at $155 billion in the United States and $385 billion worldwide; the latter is expected to reach more than $500 billion by 2010. While advertising can be seen as a necessity for economic growth and social development, it is not without social costs. Advertisement emails and other forms of junk mail have become so popular that ~they have become a major burden to users of I nternet email services, as well as a financial burden on Internet email service providers.
| ||||||||||||