问题 单项选择题 A1型题

搏动性眼球突出最常见于()

A.眶内气肿

B.炎性假瘤

C.眼眶静脉曲张

D.颈动脉海绵窦瘘

E.海绵状血管瘤

答案

参考答案:D

解析:眼眶静脉曲张可发生间歇性眼球突出,尤其在头低位明显。当眶顶骨壁大部分缺损出现脑膨出时也可能出现搏动性眼突,但听不到血管杂音。

阅读理解与欣赏

现代文阅读:论述类文本(12分)

阅读下面的文章

进入21世纪后,质疑达尔文进化论的声音此起彼伏。

达尔文进化论的核心是自然选择,以及与自然选择相关的生存竞争和渐变,所以达尔文一再宣称“自然界没有飞跃”。达尔文认为生物个体在长时间的演化中,经过自然选择,其微小的变异积累为显著的变异,于是形成新的物种或新的亚种。①在大量古生物化石发现的基础上,1972年,美国古生物学家古尔德和埃尔德雷奇提出了一个全新的生物进化理论“间断平衡论”认为生物的进化是渐变与跃进交替的进化模式,是基因突变或地理隔绝造成新种出现的过程。该理论比较合理地解释了地球生物演化史上许多物种突然爆发式出现的现象,指出了生物界不但有渐进式进化,也有飞跃。

“物竞天择,适者生存”的理论是达尔文进化论自然选择学说的前提和基础。②达尔文认为动植物界在十分剧烈的竞争下,适者生存,不适者淘汰;物种有利的变异将被保存下来,不利的变异则被淘汰,逐渐积累的有利变异结果就形成了新的物种。③但是20世纪60年代以来的科学研究表明,在自然界中,任何物种或生物个体,都处在一定的生态系统中。生态系统内的生物个体、物种、群落的内部以及它们之间,它们与环境的关系,不但有竞争,更有协同发展,人们熟悉的一个例子是,昆虫在采集花粉的同时,也为植物完成了授粉的任务。在这一过程中,昆虫得到食物,花得以授粉,动物与植物彼此受益,相得益彰。这种相互依赖的关系有时甚至协同进化出令人惊讶的结果。

地球上的生物物种经历了萌发、发展、壮大的过程之中,其最后归宿则是消亡,达尔文只承认渐灭,不承认突然绝灭。④达尔文之后的古生物发现与研究明确地表明,自然界不单存在着达尔文所主张的渐灭,还存在着达尔文所坚决否认的突然绝灭。⑤在较短的地质历史时期内,曾出现过生物大量整体的突然灭绝,从距今5.4亿年的寒武纪以来,这种明显的生物突然大灭绝就发生过4次。

需要指出的是,达尔文的进化论的确存在着时代局限性,但我们不能用现在的眼光去苛求他,被恩格斯誉为19世纪自然科学三大发现之一的达尔文进化论,其历史功绩是必须充分肯定的。

小题1:根据本文提供的信息,下列理解不准确的一项是(3分)              ( ▲  )

A.达尔文“自然选择”理论没能合理解释地球上某些物种突然爆发式的出现的现象。

B.20世纪60年代以来的研究表明,不同物种之间的相互依赖是生物进化的推动力之一。

C.达尔文认为,在过去的地质历史时期内,从未出现过生物大量、整体突然灭绝的现象。

D.在昆虫采集花粉的过程中,昆虫遇到食物,花得以授粉,这一事例证明了“间断平衡论”的正确。小题2:以下文字是从原文中截取的,应还原至文中①②③④⑤哪一处?(只答序号)(3分)                                                                   

(  )

他在《物种起源》中说:“确信通常的时代没有一次中断过,没有任何激变曾经使整个地球变为荒芜。”

小题3:本文介绍的新的生物进化理论和研究,主要质疑的是达尔文的哪三个观点?请用文中原话回答。(6分)

阅读理解

Boeing said Wednesday that it was entering the space tourism business, an announcement that could bolster(增强)the Obama administration’s efforts to transform the National Aeronautics and Space Administration into an agency that focuses less on building rockets and more on nurturing a commercial space industry.

The flights, which could begin as early as 2015, would most likely launch from Cape Canaveral in Florida to the International Space Station. The Obama administration has proposed turning over to private companies the business of taking NASA astronauts to orbit, and Boeing and Bigelow Aerospace of Las Vegas won an $18 million contract this year for preliminary (初步的)development and testing of a capsule that could carry seven passengers.

Current NASA plans call for four space station crew members to go up at a time, which would leave up to three seats available for space tourists. The flights would be the first to give nonprofessional astronauts the chance to go into orbit aboard a spacecraft launched from the United States. Seven earlier space tourists have made visits to the space station, riding in Russian Soyuz capsules.

“We’re ready now to start talking to possible customers,” said Eric C. Anderson, co-founder and chairman of Space Adventures, the space tourism company based in Virginia that would market the seats for Boeing.

Boeing and Space Adventures have not set a price, although Mr. Anderson said it would be competitive with the Soyuz flights, which Space Adventures arranged with the Russian Space Agency. Guy Laliberté, founder of Cirque du Soleil, paid about $40 million for a Soyuz ride and an eight-day stay at the space station last year. But the possibilities that anyone buying a ticket will get to space on an American vehicle depend on discussions in Congress about the future of NASA.

小题1: Which of the following is most probably a private travel company?

A. Boeing.                     B. Space Adventure.

C. NASA.                       D. Russian Space Agency.

小题2: How many people can be carried along on a capsule to the space station?

A.3.

B.4.

C.7.

D.11.小题3: What can be inferred from the passage?

A.The American space tourism company is located in Virginia.

B.Russia has already taken lead in working on the space tourism business.

C.NASA has decided to focus less on building rockets because of the financial crisis.

D.In 2015, America would be the first country in the world to run the space tourism business.小题4:What’s the best title of the passage?

A.Taking NASA Astronauts to Orbit.

B.Living in the Space Station Space.

C.Ticket Price under Discussion.

D.Boeing Could Fly You to Orbit by 2015.