题目内容
16．Scientists said they have found evidence of a giant planet far out in our solar system．In a statement，the California Institute of Technology（Caltech） said this planet travels a strange"highly elongated orbit in the distant solar system"．
The discovery was made by two researchers at Caltech； Konstantin Batygin and Mike Brown．They used mathematical modeling and computer simulations （模拟）to find the planet．
So far，there have not been any direct observations of the planet．
"My jaw hit the floor，"said astronomer Mike Brown，the moment he realized there might be a ninth planet．
The scientists said it would take this planet 10，000 to 20，000 years just to make one full orbit around the sun．The new planet，called"Planet Nine"has a mass about 10 times the size of Earth．
It is believed that the planet orbits，or travels，around the sun from a great distance．The planet Neptune's average distance to the sun is about 4.5billion kilometers．But"Planet Nine"could be 20times farther away from the sun than that．
While they did not get a picture of"Planet Nine"yet，the scientists say they are using the biggest and best telescopes on Earth to try to find it．
Brown and Batygin reported their finding in The Astronomical Journal．They say that this new planet is so large that there should be no doubt that it is a true planet，once they confirm it．
Robert Massey is with the Royal Astronomical Society in London．He told AFP that planets have been predicted before，and then were not found．But，he said the work of the these researchers is definitely worth following up．"It would be a really exciting thing to find．At the moment it's simply a prediction（预测）．"
54．What does the underlined sentence in Paragraph 5 mean？A
A．He felt quite shocked
B．He felt on the floor
C．He made a public speech
D．He went on observing
55．What can we know about"Planet Nine"from the text？D
A．It could be the ninth planet discovered since ancient times
B．It could be about 10times as large as the earth
C．It could travel around the Earth on a special orbit
D．Its distance to the sun could be about 90 billion kilometers
56．What's Robert's attitude towards the discovery of"Planet Nine"？D
A．doubtful B．unclear C．worried D．supportive
57．What's the best title for the text？C
A．The discovery of the largest planet
B．The prediction of a ninth planet in solar system
C．Attitudes to"Planet Ninth"in the solar system
D．Values of finding"Planet Ninth"in the solar system．
分析 科学家表示他们发现了太阳系存在另一大行星的证据．可能是第九颗行星，对于这第九颗行星科学家们的不同表现和态度．
解答 54．A 推理判断题．根据句子"My jaw hit the floor．the moment he realized there might be a ninth planet．我的下巴撞到地板上了．当他意识到有第九颗行星的时候说的话，可见是惊讶的，所以答案选A．
55．D 细节理解题．根据句子The planet Neptune's average distance to the sun is about 4.5billion kilometers．尼普顿星球的平均距离太阳约45亿公里．所以答案选D．
56．D 推理判断题．根据句子he said the work of the these researchers is definitely worth following up．他说，这些研究人员的工作绝对值得跟进．可见他对于发现第九颗行星是支持的，所以答案选D．
57．C 标题归纳题．科学家表示他们发现了太阳系存在另一大行星，可能是第九颗行星，对于这第九颗行星科学家们的不同表现和态度，所以答案选C．
点评 阅读理解题测试考生在阅读基础上的逻辑推理能力，要求考生根据文章所述事件的逻辑关系，对未说明的趋势或结局作出合理的推断；或根据作者所阐述的观点理论，对文章未涉及的现象、事例给以解释．考生首先要仔细阅读短文，完整了解信息，准确把握作者观点．
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