派氏指数是德国经济学家派许首创的，他主张( )。A．数量指标指数和质量指标指数的同

出现重度中暑的情况之后，应该采取的措施有：（） 

A、移到荫凉处

B、让其平卧（或抬高下肢）

C、拨打120

D、以上都有

22岁女医学生，课间实习观看外科手术，站立3小时，突然头晕、恶心、眼前发黑、意识丧失、跌倒，四肢强直，伴面色苍白、出汗，约持续10秒种后意识清醒。神经系统查体未见阳性体征。血糖化验为4mmol／L，头MRI检查未见异常。最可能的诊断（）。

A.假性癫痫发作

B.强直性发作

C.低血糖症

D.晕厥

E.椎-基动脉供血不足

Ｈ2Ｓ在空气中最高允许浓度是10mg／m^3，浓度越低，对人体毒害越大。

2011年1-5月，全国进出口总额14018亿美元，同比增长27.4%；其中，出口7124亿美元，增长25.5%；进口6894亿美元，增长29.4%。
当月进、出口保持较快增长。5月份，全国进出口总额3013亿美元，同比增长23.5%，环比增长0.4%。其中，出口1 572亿美元，环比增长1%，同比增长19.4%，增速比上月回落10.5个百分点；进口1441亿美元，环比下降0.1%，同比增长28.4%，增速比上月加快6.6个百分点。
部分大宗原材料进口量比上月有所减少。5月份，进口原油2155万吨，同比增长20.8%；天然橡胶12万吨，同比增长33.3%；铁矿砂5330万吨，同比增长2.9%；未锻造铜及铜材25.5万吨，同比下降35.8%；未锻造铝及铝材7.5万吨，同比下降20.9%；氧化铝11万吨，同比下降76.1%。与上月相比，原油、铁矿砂进口量基本持平，其他产品进口量有不同程度减少。1-5月，累计进口原油1.07亿吨，同比增长11.3%；进口铁矿砂2.83亿吨，同比增长8.1%；进口煤5688万吨，同比减少16.6%。
大宗商品进口价格小幅上涨。5月份，原油进口平均价格为843美元/吨，同比上涨40.6%；铁矿砂平均价格为167美元/吨，同比上涨27.3%；天然橡胶平均价格为4969美元/吨，同比上涨57.7%；未锻造铜及铜材、未锻造铝及铝材进口平均价格分别为9552美元/吨和5133美元/吨，同比上涨25.8%和31.2%；进口氧化铝平均价格为471美元/吨，同比上涨28.4%。
轻纺产品出口保持快速增长。5月份，纺织品、服装、鞋类出口额同比分别增长23.7%、23.9%和17.7%；家具、箱包、塑料制品出口额分别增长3.3%、31.7%和17.7%；灯具、玩具分别增长19.2%和0.6%。
机电产品、高新技术产品出口平稳。5月份，机电产品、高新技术产品出口额分别为880亿美元和429亿美元，分别占全国出口额的56%和27.3%，同比分别增长14.2%和8.6%；与一季度月均出口额相比，分别增长13.8%和8.5%。其中，手机、自动数据处理设备及其部件出口额分别增长12.7%和2.9%，彩电出口额下降11.9%。

下列说法中，正确的共有( )个。
Ⅰ．2011年1-4月，我国进出口总额的同比增长率为26%
Ⅱ．2011年1-5月，我国进口原油总额约为902亿美元
Ⅲ．2011年5月，我国进口原材料中，价格增长最快的是天然橡胶
Ⅳ．2010年5月，我国机电产品和高新技术产品出口额约占出口总额的88%

A．1
B．2
C．3
D．4

Increasingly, historians are blaming diseases imported from the Old World for the great disparity between the native population of America in 1492--new estimates of which jump as high as 100 million, or approximately one-sixth of the human race at that time--and the few million full-blooded Native Americans alive at the end of the nineteenth century. There is no doubt that chronic disease was an important factor in the sharp decline, and it is highly probable that the greatest killer was epidemic disease, especially as manifested in virgin-soil epidemics.

Virgin-soil epidemics are those in which the populations at risk have had no previous contact with the diseases that strike them and are therefore immunologically almost defenseless. That virgin-soil epidemics were important in American history is ply indicated by evidence that a number of dangerous maladies--smallpox, measles, malaria, yellow fever, and undoubtedly several more--were unknown in the pre-Columbian New World. The effects of their sudden introduction are demonstrated in the early chronicles of America, which contain reports of horrible epidemics and steep population declines, confirmed in many cases by quantitative analyzes of Spanish tribute records and other sources. The evidence provided by the documents of British and French colonies is not as definitive because the conquerors of those areas did not establish permanent settlements and began to keep continuous records until the seventeenth century, by which time the worst epidemics had probably already taken place. Furthermore, the British tended to drive the native populations away, rather than to enslave them as the Spaniards did; so that the epidemics of British America occurred beyond the range of colonists’ direct observation.

Even so, the surviving records of North America do contain references to deadly epidemics among the native population. In 1616--1619 an epidemic, possibly of pneumonic plague, swept coastal New England, killing as many as nine out of ten. During the 1630’s smallpox, the disease most fatal to the Native American people, eliminated half the population of the Huron and Iroquois confederations. In the 1820’s fever ruined the people of the Columbia River area, killing eight out of ten of them.

Unfortunately, the documentation of these and other epidemics is slight and frequently unreliable, and it is necessary to supplement what little we de know with evidence from recent epidemics among Native Americans. For example, in 1952 an outbreak of measles among the Native American inhabitants of Ungava Bay, Quebec, affected 99 percent of the population and killed 7 percent, even though some had the benefit of modern medicine. Cases such as this demonstrate that even diseases that are not normally fatal can have destroying consequences when they strike an immunologically defenseless community.

Notes: disparity 差距。 virgin-soil处女地。 malady 疾病 chronicle 编年史。 tribute 贡品。 pneumonic plague肺鼠疫。confederation 同盟。 smallpox 天花。measles 麻疹。

The primary purpose of the text is to（）

A. provide support for a hypothesis

B. reconcile opposing viewpoints

C. refute a common misconception

D. analyze an argument in detail