【1】The Spanish Flu Epidemic
If you’re worried about the possibility of a coming bird flu epidemic,you can take comfort in the fact that humanity has survived a similar influenza epidemic in the past.Starting its rounds at the end of World War I,the 1918 flu killed an estimated 50 million people.
Popularly known as the Spanish Flu,this type of influenza was far worse than your common cold.Normally,influenza only kills those who are more vulnerable to disease,such as newborns,the old or the sick.However,the Spanish Flu was prone to killing the young and healthy.Often it would disable its victims in hours;within a day,they would be dead,typically from extreme cases of pneumonia(肺炎).
The Spanish Flu was quite nasty-fast-spreading and deadly.It managed to spread across the globe,devastating the world.Then suddenly,after two years ravaging(蹂躏)the Earth,it disappeared as quickly as it had arisen.
Despite its nickname,the Spanish Flu did not originate in Spain.Its true origins are unknown.Some believe it started in US forts and then spread to Europe as America joined the war;others think that it populated the trenches of the English and the French and eventually broke out in 1918.Regardless of where it started,eventually a fifth of the world population suffered the disease,with a global mortality rate(死亡率)estimated at 2.5% of the population.
Modernity was partly to blame for the quick spread of the disease.It passed throughout the world on trade routes and shipping lines.It hit Northern America,Europe,Asia,Africa and the South Pacific.The war did not help at all-the movement of supplies and troops aided the spread of the Spanish Flu,as well as the trench warfare.Imagine the speed at which a virus can spread in a crowded ditch.The fast emergence of the virus in the trenches caused some soldiers to believe that the Spanish Flu was a new form of biological warfare.
Luckily,the Spanish Flu simply vanished by 1920.It is believed the flu simply ran out of fuel to spread.
16.The Spanish Flu started during World War I.
A.Right B.Wrong C.Not mentioned
17.The Spanish Flu posed a greater threat to the old and the sick.
A.Right B.Wrong C.Not mentionedWww.KaO8.CC
18.As the Spanish Flu was spreading,people in Australia were worried.
A.Right B.Wrong C.Not mentioned
19.The Spanish Flu disappeared two years after it broke out.
A.Right B.Wrong C.Not mentioned
20.The Spanish Flu was named after the place where it started.
A.Right B.Wrong C.Not mentioned
21.About half of the people in the world suffered from the Spanish Flu.
A.Right B.Wrong C.Not mentioned
22.Biological warfare originated in the 20th century.
A.Right B.Wrong C.Not mentioned
答案:16.A17.B18.C19.A20.B21.B 22.C
【2】AIDS
The World Health Organization (WHO) says as many as 10 million persons worldwide may have the virus that causes AIDS(艾滋病). Experts believe about 350 thousand persons have the disease. And one million more may get it in the next five years. In the United States, about 50,000 persons have died with AIDS. The country's top medical official says more than 90 percent of all Americans who had the AIDS virus five years ago are dead.
There is no cure for AIDS and no vaccine(疫苗) to prevent it. However, researchers know much more about AIDS than they did just a few years ago. We now know that AIDS is caused by a virus. The virus invades healthy cells, including white blood cells that are part of our defense system against disease. It takes control of the healthy cell's genetic(基因的) material and forces the cell to make a copy of the virus. The cell then dies. And the viral particles move on to invade and kill healthier cells.
The AIDS virus is carried in a person's body fluids(液体). The virus can be passed sexually or by sharing instruments used to take intravenous(进入静脉的) drugs. It also can be passed in blood products or from a pregnant woman with AIDS to her developing baby.
Many stories about the spread of AIDS are false. You cannot get AIDS by working or attending school with someone who has the disease. You can not get it by touching drinking glasses or other objects used by such persons. Experts say no one has gotten AIDS by living with, caring for or touching an AIDS patient.
16 According to the WHO, there are now 10 million AIDS patients in the world.
A Right B Wrong C Not mentioned
17 America has the largest number of AIDS patients in the world.
A Right B Wrong C Not mentioned
18 The cause of AIDS remains a mystery to researchers.
A Right B Wrong C Not mentioned
19 AIDS patients today cannot be cured yet.
A Right B Wrong C Not mentioned
20 A pregnant woman with AIDS cannot pass the virus to her developing baby.
A Right B Wrong C Not mentioned
21 It is unlikely that the Aids virus will be passed through handshaking.
A Right B Wrong C Not mentioned
22 Men are more easily infected with AIDS than women.
A Right B Wrong C Not mentioned
参考答案:16. B 17. C 18. B 19. A 20. B 21. A 22. C