奈韦拉平属于（） A.非核苷酸类HIV反转录酶抑制剂 B.核苷酸类HIV反转录酶抑制

男患，58岁，病史：高血压病史10余年。某日早起后突发剧烈头痛、呕吐，2小时后出现神志不清，鼾声呼吸和大小便失禁。查体：血压180/97mmHg、中昏迷，双瞳孔缩小，左侧鼻唇沟浅，左侧下肢外旋位，左侧Babinski征（+），左侧提睾反射消失。抢救该患者首选的程序为（）

A.静滴低分子右旋糖酐补充血容量

B.肌注安定预防抽搐，急查心电图

C.肌注利血平降血压，急行腰椎穿

D.静推甘露醇降低颅内压，急查头颅CT检查

E.静脉补钾，防止电解质紊乱

国有独资公司的特征有______。

A．适用有限责任公司的一般规则

B．股东会是公司的最高权力机关

C．不设立股东会，公司的权力机关是国家授权投资的机构或者国家授权的部门

D．公司的经营方针和投资计划由董事会决定

术后第二天，血压平稳应取下列何种体位最好

A．平卧
B．患侧卧位
C．半坐卧位，床头抬高30～45°
D．头低脚高位
E．向左侧卧

凡是实行招投标的项目，货物的价格按（）执行。

A．国家定价

B．中标价格

C．国家指导价

D．市场价格

British cancer’ researchers have found that childhood leukaemia is caused by an infection and clusters of cases around industrial sites are the result of population mixing that increases exposure. The research published in the British Journal of Cancer backs up a 1988 theory that some as yet unidentified infection caused leukaemia--not the environmental factors widely blamed for the disease.

"Childhood leukaemia appears to be an unusual result of a common infection," said Sir Richard Doll, an internationally-known cancer expert who first linked tobacco with lung cancer in 1950. "A virus is the most likely explanation. You would get an increased risk of it if you Suddenly put a lot of people from large towns in a rural area, where you might have people who had not been exposed to the infection. " Doll was commenting on the new findings by researchers at Newcastle University, which focused on a cluster of leukaemia cases around the Sellafield nuclear reprocessing plant in Cumbria in northern England. Scientists have been trying to establish why there was more leukaemia in children around the Sellafield area, but have failed to establish a link with radiation or pollution. The Newcastle University research by Heather Dickinson and Louise Parker showed the cluster of cases could have been predicted because of the amount of population mixing going on in the area, as large numbers of construction workers and nuclear staff moved into a rural setting. "Our study shows that population mixing can account for the (Sellafield) leukaemia cluster and that all children, whether their parents are incomers or locals, are at a higher risk if they are born in an area of high population mixing," Dickinson said in a statement issued by the Cancer Research Campaign, which publishes the British Journal of Cancer.

Their paper adds crucial weight to the 1988 theory put forward by Leo Kinlen, a cancer epidemiologist at Oxford University, who said that exposure to a common unidentified infection through population mixing resulted in the disease.

Who first hinted at the possible cause of childhood leukaemia by infection（）

A. Leo Kinlen

B. Richard Doll

C. Louise Parker

D. Heather Dickinson