试题与答案

山东省卫生厅近期组织专家对我省夏季重点传染病疫情形势进行分析研判,于5月26日发

题型:解答题

题目:

山东省卫生厅近期组织专家对我省夏季重点传染病疫情形势进行分析研判,于5月26日发布丁卫生防病信息提示.专家分析预测,今年我省手足口病疫情总体发病水平将低于2009年但高于2008年,目前已进入流行期.由于病毒型别发生转变,全省病例表现以轻症为主,重症数量相对减少.但肠道病毒EV7J型感染病例仍占一定比例,发生重症和死亡的风险依然存在.

很多市民把该病与口蹄疫相混淆,曾一度引起恐慌,其实手足口病是上世纪80年代就发现的一种常见的发疹性传染病,患者以婴幼儿多见.该病主要是由肠道病毒引起,传播快,多在夏秋季节流行,主要通过消化道传播,呼吸道飞沫、接触也可传播.

(1)手足口病患者感染的肠道病毒,从传染病的角度来说,它属于______;从免疫的角度来说,它属于______.

(2)肠道病毒EV71型传染病患者康复后可获得对该病毒的免疫力.原因是______这种免疫属于______免疫.

(3)科学研究发现,该肠道病毒在繁殖过程中容易发生变异,变异的病毒引起的疾病更难治疗和预防.那么,这种变异属于______的变异.

(4)肠道病毒与能使人患肺结核的病原体相比较,结构上最主要的区别是______.

答案:

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飞船做匀速圆周运动时,引力提供向心力,根据万有引力等于向心力,可以知道速度与轨道半径的关系为v=GMrA、在较低轨道上,当飞船加速时,在原轨道运行所需要的向心力变大,但万有引力大小不变,故引力不足以提供...

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题型:阅读理解

Ben Olsen had great careers as professional players. His story tells a lot about the past, present and future of professional soccer in America.

Ben Olsen was an important part of D.C. United's early success. He was the top new player, or rookie of the year, in 1998. His young professional career reached a high point the next season. D.C. United won the M.L.S. Cup, the league championship(锦标赛), on the strength(力量) of a Most Valuable Player performance by Olsen. He scored one of two goals for his team in the win against the Los Angeles Galaxy.

Ben Olsen looks back on his score in that championship as his most memorable. "I'd lost a lot of championships before that year, so that was a special game." said Ben Olsen.

Like many top American soccer players, Olsen played overseas. He joined the club Nottingham Forest in Britain. He says different leagues have different styles of play. "Some teams are very fast and athletic. Some teams are a little bit more low pressure on the ball and more skillful players. England has always been known to be a fast and physical league."

Olsen was also a part of the United States World Cup team of 2006. He says playing for his country was something he will never forget. 

Ben Olsen has had five operations for severe ankle(脚踝) injuries. Still, he had one of his best years in 2007. He scored seven goals including a "hat trick"-- three in one game.

Ben Olsen celebrates his third goal in one game against the New York Red Bull in June of 2007

He was recognized for his outstanding play with an M.L.S. Best Eleven award. He accepted the award in a wheelchair after a minor operation became major ankle surgery(外科手术). Ben Olsen retired after the 2009 season. Today he is an assistant coach with D.C. United.

小题1:When did Ben Olsen begin to win championship?

A. In 1998

B.Next season

C.In 1999

D.In 2006小题2:What does the underlined word ‘rookie’ mean in this sentence?

A.Success

B.New player

C.professional career

D.championship小题3:According to the passage, which of the following is true?

A.Ben Olsen has a deep love for his country

B.Ben Olsen scored three goals in 1999

C.Top American soccer players never played oversea

D.He scored ten goals in 2007小题4:What do you think is the best title for the passage?

A. Ben Olsen—the best soccer player

B. Ben Olsen’s professional career

C. Ben Olsen and D.C. United

D. An introduction to Ben Olsen

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