常用的流行病学研究方法包括（）。 A.现场实验、社区干预 B.横断面研究、病例对照研

       表面上为尊重中国领土主权独立及领土完整，实际上是为美国对外扩张提供方便的是下面哪个条约的签订[ ]

A、《凡尔赛条约》

B、《九国公约》

C、《四国条约》

D、《凡尔登条约》

中国结算公司TA系统依据基金管理人给定的申购费率，以申购当日的基金份额净值为基准，采用外扣法，计算投资者申购所得基金份额。( )

阅读理解

     After  the violent earthquake that shook Los Angeles in 1904, earthquake scientists had good news to

report: The damage and death toll(死亡人数)could have been much worse.

     More than 60 people died in this earthquake. By comparison, an earthquake of similar intensity that

shook America in 1988 claimed 25, 000 victims.

     Injuries and deaths were relatively less in Los Angeles because the quake occurred at 4:31 a.m. on a

holiday, when traffic was light on the city's highways. In addition, changes made to the construction codes

in Los Angeles during the last 20 years have strengthened the city's buildings and highways, making them

more resistant to quakes.

     Despite the good news, civil engineers aren't resting on their successes. Pinned to their drawing boards are blueprints (蓝图) for improved quake-resistant buildings. The new designs should offer even greater

security to cities where earthquakes often take place.

     In the past, making structures quake-resistant meant firm yet flexible materials, such as steel and wood, that bend without breaking. Later, people tried to lift a building off its foundation, and insert rubber and

steel between the building and its foundation to reduce the impact of ground vibrations. The most recent

designs give buildings brains as well as concrete and steel supports. Called smart buildings, the structures

respond like living organisms to an earthquake's vibrations. When the ground shakes and the building tips

forward, the computer would force the building to shift in the opposite direction.

     The new smart structures could be very expensive to build. However, they would save many lives and would be less likely to be damaged during earthquakes.

1. One reason why the loss of lives in the Los Angeles earthquake was comparatively low is that        .

A. new computers had been installed in the buildings

B. it occurred in the residential areas rather than on the highways

C. large numbers of Los Angeles residents had gone for a holiday

D. improvements had been made in the construction of buildings and highways

2. The function of the computer mentioned in the passage is to           .

A. counterbalance an earthquake's action on the building.

B. predict the coming of an earthquake with accuracy.

C. help strengthen the foundation of the building.

D. measure the impact of an earthquake's vibrations.

3. The smart buildings discussed in the passage           .

A. would cause serious financial problems.

B. would be worthwhile though costly.

C. would increase the complexity of architectural design.

D. can reduce the ground vibrations caused by earthquakes.

4. It can be inferred from the passage that in minimizing the damage caused by earthquakes attention 

should be focused on            .

A. the increasing use of rubber and steel in capital construction

B. the development of flexible building materials

C. the reduction of the impact of ground vibrations

D. early forecasts of earthquakes

5. The author's main purpose in writing the passage is to__________.

A. compare the consequences of the earthquakes that occurred in the U.S.

B. encourage civil engineers to make more extensive use of computers

C. outline the history of the development of quake-resistant building materials

D. report new developments in constructing quake-resistant buildings

文化与生命______，与生命相渗透的前人的文化已随生命的消失而消失，我们仅是得到了它们的倒影——人类历史文化的倒影。好比我们弯腰低头俯对河水，我们看到的水中映像便______是正相了，但是我们总得直起身来，满脸赧颜羞色地接受这______的倒影……
填入划横线部分最恰当的一项是______。

A．同在 俨然 宿命
B．共生 完全 可怕
C．伴随 必然 艰难
D．纠缠 几乎 沉重

测量实际制冷系统压缩机吸气口温度的目的是为了帮助决定运行工况图上的过（）。