某设备工程时标网络计划如下图所示，工作A和E的总时差分别为（）。 A．2、2 B．1

男性患者，45岁，肝硬化病史3年，突然呕血300ml，黑粪3次约500ml，下列哪项不可能出现（）.

A.脾缩小

B.血浆尿素氮升高

C.腹腔积液减少

D.出现肝肾综合征

E.诱发肝性脑病

以下属于天线的电性能的参数是（）。

A.工作频段

B.增益

C.方向图

D.前后比

E.旁瓣抑制与零点填充

F.极化方式

阅读理解。

     CHICAGO (Reuters) - Swine flu has killed nearly 10,000 Americans, including 1,100 children and

7,500 younger adults, and infected one in six people in the United States since arriving last April, health

officials said on Thursday.

     Dr. Thomas Frieden, director of the U.S. Centers for Disease Control and Prevention, said more

than 200,000 Americans had been hospitalized - about the same number who are affected by seasonal

flu in an entire year.

     "About 15 percent of the entire country has been infected with H1N1 influenza, or about one in six

people," Frieden told a media briefing.

"That still leaves most people not having been infected and still remaining susceptible to H1N1 influenza,

" he said.

     He said supplies of H1N1 vaccine (疫苗) had continued to improve, and some 85 million doses of

the vaccine had been made available for distribution so far, with 12 million more doses added this week.

     That is up from 73 million doses a week ago - but still far fewer than had been hoped for by this week.

     Even so, Frieden said vaccine supplies had opened up enough that states were beginning to distribute

the vaccine to the general population.

     He urged people not to be complacent about (沾沾自喜) getting the vaccine because of reports that

the current wave of H1N1 influenza is decreasing.

     "This is still a good window of opportunity to be vaccinated," he said. "Vaccination remains the most

important thing you can do to protect yourself and your family from H1N1 influenza."

     He said the seasonal flu season was beginning and it was not clear what would happen with H1N1 or

whether there would be a third wave of the virus in the spring.

     "We know that the more people who get vaccinated, the lower the likelihood will be of additional

cases or a third wave," Frieden said.

     In a typical year, seasonal influenza kills 36,000 Americans and puts 200,000 into the hospital.

1. Which of the following is FALSE according to the passage?

A. Nearly 10,000 Americans, including 1,100 children and 7,500 younger adults died.

B. One sixth people in the United States were infected by Swine flu.

C. More than 200,000 Americans had been in hospital.

D. The American government had distribute most of the vaccine to the general population.

2. In the sentence "This is still a good window of opportunity to be vaccinated," the "

     window of opportunity" means ______.

A. favourable time

B. bad luck

C. unfortunate occasion

D. favourable window

3. Seasonal influenza ______. 

A. usually cause more deaths and a lot of people in hospital

B. will be a third wave in the next spring

C. will continue to spread

D. will make more people affected

4. According to the passage, people in America should ______.

A. forget H1N1 influenza because it is decreasing gradually

B. continue to protect themselves and their family from H1N1 influenza though it is decreasing

C. be complacent about getting the vaccine because of reports

D. often go outdoors

打滑

实行出口退税的税种包括( )。

A．增值税

B．营业税

C．个人所得税

D．所得税

E．消费税