评价人群疫苗接种效果最关键的指标是()。 A.安全性 B.保护率 C.临床表现 D.

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问题:

评价人群疫苗接种效果最关键的指标是()。

A.安全性

B.保护率

C.临床表现

D.种后反应率

E.抗体水平

考点:疾病控制(医学高级)传染性疾病控制传染性疾病控制题库
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如图所示,带正电的电荷固定于Q点,电子在静电力作用下沿顺时针方向做以Q点为焦点的椭圆运动,O为椭圆的中心,M、P、N为椭圆上的三点,M和N分别是轨道上离Q点最近和最远的点,则电子在运动的过程中(  )

A.在M点的速率最小

B.在N点的电势能最小

C.在P点受的库仑力方向指向O点

D.椭圆上N点的电势最低

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某班要从8名同学中选4人参加校运动会的4×100米接力比赛,其中甲、乙两名同学必须入选,而且甲、乙两人必须跑第一棒或最后一棒,则不同的安排方法共有______种(用数字作答).

题型:单项选择题

读甲、乙两幅区域图和有关材料,完成下列问题:(13分)

(1)指出甲、乙两图所示区域的主要农业地域类型。(4分)

甲图:                            ;乙图:                           

(2)比较武汉、芝加哥两城市兴起和发展的交通区位条件的异同点。(4分)

1949年洞庭湖面积有4350平方千米,由于泥沙淤积和大量围垦,到1997年其面积只有2691平方千米,缩小了近40%。

(3)试分析洞庭湖面积不断缩小对周围自然环境产生的不利影响,并说明针对该问题应采

取的主要措施。(4分)

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B

KATHMANDU, Nepal (CNN) - Nepal has given its security personnel permission to shoot pro-Tibet demonstrators during China's Olympic flame climb to Mount Everest's summit early next month.

"About 25 soldiers and policemen have established camps on the mountain and they have been ordered to use force if necessary to stop any anti-Chinese activities," Mod Raj Dotel, spokesman for the home ministry, said Sunday. "This could mean shooting if necessary."

Security personnel will also check mountain climbers for non-essential expedition materials, Dotel added.

"If anyone is found with anti-Chinese material their permit will be canceled and returned from the mountain," he said.

Chinese climbers plan to take the Olympic flame to the top of the world's highest peak, at 8,848 meters (29,028 feet) as part of the global relay leading up to the August 8 opening of the Summer Olympics in Beijing.

Spring is the most popular season for climbing Mount Everest, which straddles(跨越) the border between Nepal and Tibet, an autonomous region of China.

The Nepali government has given permits to dozens of climbers from 30 expeditions this season.

But between May 1 and May 10, climbers are barred from going above 6,400 meters until the torch run is completed. China plans to take the Olympic flame to the summit sometime then.

Bad weather conditions allow only about two opportunities in May for a push to the summit.

The Chinese have not allowed any expedition to climb the mountain from the north side, according the Kathmandu representative of the Tibet China Mountaineering Association.

Almost every day in the past month, Nepalese police have arrested pro-Tibet protesters from in front of the Chinese Embassy and the United Nations offices. The demonstrators are released later in the evening. 

Supporters of Tibet punish the government's attitude toward the autonomous region, and many believe China should not have been awarded the honor of hosting the Olympic Games.

Earlier torch relay stops in London, England; Paris, France; and San Francisco, California attracted tens of thousands of demonstrators. They led to attacks on the torch and relay participants, and prompted police to make dozens of arrests.

Subsequent stops in Argentina, Tanzania and Oman were trouble-free.

In Pakistan, authorities closed the relay to the public. And India shortened the relay and kept thousands of anti-Chinese protesters at bay by sealing off roads and shuttering buildings along the route.

The relay went smoothly in Bangkok, Thailand, on Saturday, amid heavy security and scattered protests along the route.

The flame arrived in Malaysia on Sunday. About 1,000 police officers will be on hand to watch for protesters during a relay in the capital city Kuala Lampur Monday.

61.When will China's Olympic flame probably reach Mount Everest's summit?

A.April 28        B.May 12        C.June 10        D.May 7

62.The underlined word “barred” means_____________.

A.permitted     B.stopped       C.encouraged    D.introduced 

63.How many times Climbers can reach the top of the mountain at most in May?

A.once               B.twice   

C.three times            D.as many times as they can

64.Where did the torch relay meet no trouble?

A.India          B.Nepal     C.Tanzania          D.France

65.What is the attitude of the Nepali government towards towards China's Olympic flame climb to Mount Everest's summit?

A.negative          B.positive         C.ambiguous            D.Indifferent

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胫骨干骨折中下段1/3骨折易引起()

A.骨的缺血坏死

B.血管损伤

C.神经损伤

D.骨延迟愈合

E.骨筋膜间隔综合征

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