感染性发热最常见的病原体是（）。 A.病毒 B.立克次体 C.细菌 D.真菌 E.肺

一项工作，甲单独做需10天完成，乙单独做需15天完成。问两人合作3天完成工作的几分之几（）

A．1/2

B．1/3

C．1/5

D．1/6

小芳同学在探究“决定导体电阻大小的因素”时，做出了如下猜想：

猜想①：在温度不变时，导体的电阻与导体的材料有关；  

猜想②：在温度不变时，导体的电阻与导体的长度有关；  

猜想③：在温度不变时，导体的电阻与导体的横截面积有关．

供她选择的导体如表三所示：

（1 ）要验证猜想①，小芳同学应选择的两段导体是               （选填材料的序号），

（2 ）要验证猜想②，小芳同学应选择的两段导体是               （选填材料的序号），

（3 ）要验证猜想③，小芳同学应选择的两段导体是               （选填材料的序号）。

“VOD”表示（）。

A．真空吹氧脱碳法

B．钢包炉法

C．氩氧脱碳法

香蕉曲线是通过( )绘制而成的。

A．ES与LS
B．EF与LF
C．ES与EF
D．LS与LF

World Health Organization (WHO) officials recently urged Asia-Pacific governments to shake off complacency and intensify the fight against tuberculosis (TB), which kills 1,000 people a day in the region. Shigeru Omi, regional director of WHO for the Western Pacific, said deaths caused by tuberculosis continue to rise in the region as ’more and more people are infected with the dreadful disease every year.
"Every year, an additional two million tuberculosis cases are diagnosed in the region," Omi said at a news conference during the opening of a two-day meeting of Asian’ parliamentarians to discuss strategies to control the disease. (41) "When it comes to developed countries, the reason for the increase of TB is related to the ageing society," he said." (42) ""One common fact among developing countries and developed countries is complacency, "Omi added." (43) "
WHO said among the "high burden, high risk" countries in the region are Cambodis, China, Laos, Mongolia, Papua New Guinea, the Philippines and Vietnam. (44) It noted that more that 40 million people are infected with the disease and "10 percent of them -will develop TB in their lifetime. "In Cambodia, more than 7 million people, or 60 percent of the population, are infected with the disease, while in Vietnam more than 145, 000 people are infected each year. "In several developed and newly industrialized countries in the Western Pacific region, TB prevalence has not decreased markedly during the last decade although economic growth should make more resources available to deal with the problem, "WHO said. (45) .
Omi expressed confidence that with renewed vigilance among health officials in the region. TB prevalence could be reduced by half by 2010.
[A] If you become elderly, your immune system is becoming weaker and weaker.
[B] In Japan, the number of diagnosed cases rose to 48, 264 in 1999 from 42, 472 cases in 1996.
[C] Omi pointed out that the main factor for the rise of TB cases in developing countries is the rapid increase of people who migrate into the big cities and live in unsanitary conditions.
[D] There is no doubt that tuberculosis will be eliminated completely everywhere in the world in the near future.
[E] They thought we have already conquered tuberculosis, so they become a little bit complacent.
[F] WHO records showed that in China, tuberculosis is one of the most common causes of death.
[G] In Asia, the number of diagnosed cases rose to 148, 264 in 2001 from 42, 472 cases in 2005.