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【判断题】
北京54坐标系是地心坐标系，西安80坐标系则是参心坐标系。A.
正确
B.
错误
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【简答题】Could the Internet be totally free and should it be? Should the Internet be regulated? The recent disorder in the Arab world ____ by a disputed (有争议的) video damaging the image of Prophet (先知) Muhammad...
【单选题】Hepatitis is a disease characterized by inflammation of and injury to the liver. The disease has many causes, including misuse of alcohol and drugs, but viruses are the most common cause. Researchers ...
A.
Scientists do not know exactly why Hepatitis develops.
B.
Hepatitis A often breaks out in filthy places where food and water are easily contaminated.
C.
Symptoms of hepatitis include languor, loss of appetite, distress of the stomach, and yellowness of urine.
D.
Hepatitis B is the best-known form. of viral hepatitis.
E.
The chronic hepatitis lasts a long time and is most likely to recur.
F.
People should pay attention to public environment for the preservation of health. Paragraph 2______.
【单选题】If pollution continues to increase at the present rate, formation of aerosols in the atmosphere will cause the onset of an ice age in about fifty years' time. This conclusion, reached by Dr. S. I. Ras...
A.
By absorbing more and more particles.
B.
By reflecting much of the sun's heat.
C.
By attracting more and more travelers.
D.
By increasing the carbon dioxide content of the atmosphere.
【单选题】在病例对照研究中,选择对照的要求是
A.
未患某病的人
B.
病例来源的人群中未患某病,其他特征与病例组相同
C.
病例来源的人群中未患所研究的疾病,某些可能影响患病的因素与病例组具有可比性的人
D.
未患某病,其他特征与病例组相同
E.
未患某病,与病例组具有同质的人
【简答题】In a society such as the United States or Canada, which has many national, religious and cultural differences, people highly value individualism--the differences among people. Teachers place a lot of ...
【简答题】(Passage 2, Lines 2-3, Para. 2) In the 1880s the United States was a land sharply divided between the immensely wealthy and the very poor.
【简答题】动眼神经、滑车神经和展神经穿________出颅；动眼神经连于中脑的________，滑车神经连于中脑背面________下方，展神经连于____内侧份。
【单选题】Eating Meat—Less or More? Every second in the United States alone, more than 250 animals are slaughtered for food, adding up to more than 8 billion animals each year. Reducing the amount of meat in on...
A.
They feel that eating animals is unethical.
B.
There are fewer livestock available due to the environmental pollution.
C.
The consumption of meat will lead to financial problem.
D.
Being a vegetarian is beneficial to the protection of water.
【单选题】在病例对照研究中,选择对照的要求是:
A.
未患病的人
B.
病例来源的人群中未患某病，其他特征与病例组相同
C.
病例来源的人群中未患所研究的疾病，某些可能影响患病的因素与病例组具有可比性的人
D.
未患某病，其他特征与病例组相同
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