社会医学研究最常用的研究方法是（） A.调查研究 B.实验研究 C.卫生服务研究 D

地黄生用和炮制后的功效有所不同。

生地黄的功效是（）

A.清热.生津.凉血.止血

B.补血止血

C.活血补血

D.滋阴补血.益精填髓

E.凉血止血

F.清热凉血.养阴生律

女性，25岁，高热1周，伴轻度活动后呼吸困难，神志不清1天。辅助检查示：尿蛋白2．0g／L，胸片未见异常，超声心动图提示肺动脉压为45mmHg，头颅CT正常

患者最可能的诊断是（）

A.中枢神经系统感染

B.结核性脑膜炎

C.系统性红斑狼疮

D.原发性肺动脉高压

E.原发性血管炎

车轮与钢轨的接触应力可达700～900Mpa。

Paris is the capital of France, a country in the west of Europe. It is also one of the most beautiful and most famous cities in the world.

Paris is called the City of Light. It is also an international fashion center. What modern women are wearing in Paris will soon be worn by many women in other parts of the world. Paris is also a famous world center of education. For instance, the headquarters of UNESCO, the United Nations Educational, Scientific, and Cultural Organization, is in Paris.

The Seine River divides the city into two parts. Thirty-two bridges cross this scenic river. The oldest and perhaps most well-known is the Pont Neuf, which was built in the sixteenth century. The Sorbonne, a famous university, is located on the Left Bank (south side) of the river. The beautiful white church Sacre Coeur lies on top of the hill called Montmartre on the Right Bank (north bank) of the Seine.

There are many other famous places in Paris, such as the famous museum the Louvre as well as the cathedral of Notre Dame. However, the most famous landmark in this city must be the Eiffel Tower.

Paris is named after a group of people called the Parisii. They built a small village on an island in the middle of the Seine River about two thousand years ago. This island, called the le de la Cite, is where Notre Dame is located. Today around eight million people live in the Paris area.

小题1: The best title for the text would be ______.

A．The City of Paris

B．The French Language

C．Education and Culture in France

D．The Eiffel Tower, the Symbol of Paris小题2:The underlined word “headquarters” (paragraph 2) means _______.

A．buildings

B．research center

C．market

D．head office小题3:We can infer from the text that Notre Dame is located ______.

A．on the Right Bank

B．on the Left Bank

C．on neither bank

D．on both banks

目前对于内源性感染可采取哪些措施预防？