Question

【题目】 Most of us have looked up at the stars that fill the night sky and wondered whether we’re alone in the universe. Indeed, the question of whether there’ s life out there has been something humankind ’s been asking itself for countless years. But thanks to China’s Five-hundred-meter Aperture Spherical Telescope (FAST), the answer to this question may come a lot sooner than we expected.

The telescope has a huge round reflector, which measures 500 meters across and has a perimeter（周长）of 1.6 kilometers. Because of its great size, it would have been both difficult and inefficient to get FAST to move like a regular telescope. Instead, FAST’s designers came up with a great solution: its surface is made up of 4450 panels which can be individually adjusted. This clever design feature allows scientists to detect radio signals from any angle with a great degree of accuracy. “Panels can change their positions through connected wires and parallel （关联的） robots. We can control their position with an accuracy of 1 mm,” Zheng Yuanpeng, chief engineer of the telescope’s panel project, told Xinhua News Agency.

FAST’s engineers also had the task of finding a suitable location. As any interference would affect its ability to detect distant radio waves, it needed to be built in a remote area. Luckily, the perfect spot was found in the beautiful mountains of Guizhou Province. “There are three hills about 500 meters away from one another, creating a valley that is perfect to support the telescope," Sun Caihong, chief engineer of FAST’ s construction, told Xinhua.

And although it wasn’t yet fully operated, FAST had already made great discoveries by October 2017. Since 1967, only around 2000 pulsars （脉冲星） have been discovered, yet FAST had detected six more by October 2017. Once FAST is fully up and running, we may finally have the answer to one of the biggest questions in history.

【1】What is the purpose of mentioning the question in Paragraph 1?

A.To introduce the new giant telescope.

B.To explain why there is life in universe.

C.To remind readers to think about the life in space.

D.To emphasize the question that should be answered.

【2】What can we know from Paragraph 2?

A.The telescope is made up of many panels.

B.The area of FAST is about 800 square kilometers.

C.The engineer can handle FAST’s position accurately.

D.The individual panel helps scientists catch radio signals.

【3】Why was FAST built in Guizhou?

A.Because Guizhou is a remote province.

B.Because Guizhou has an ideal valley.

C.Because Guizhou has beautiful mountains.

D.Because Guizhou has the ability to build it.

【4】What does the last paragraph mainly talk about?

A.FAST’s timeline.B.FAST’s future.

C.FAST’s operation.D.FAST’s discoveries.

Answer 1

【答案】

【1】A

【2】D

【3】B

【4】D

【解析】

这是一篇说明文。文章介绍了中国500米口径球面射电望远镜，它的设计原理、选址以及发展前景等多方面的信息。

【1】推理判断题。文章第一段通过提出问题，再引出答案，在引出答案的同时引出了本文要介绍的我国500米口径球面射电望远镜。所以第一段提出问题的目的是引出本文的介绍对象。这也是说明文常见的写作手法。故选A。

【2】推理判断题。由文中的“its surface is made up of 4450 panels which can be individually adjusted. This clever design feature allows scientists to detect radio signals from any angle with a great degree of accuracy.（它的表面由4500片可独立调节的金属板组成。这种聪明的设计可以让科学家从不同的角度精确的探测到无线电信号。）”可推知，这些金属板能帮助科学家捕捉无线电信号。故选D。

【3】推理判断题。由文章第三段中的“There are three hills about 500 meters away from one another, creating a valley that is perfect to support the telescope（这儿有三座间距500米左右的山，是安置望远镜的绝佳的山谷）”可知，望远镜之所以安置在贵州，是因为贵州有一个很好的山谷。故选B。

【4】主旨大意题。由最后一段的首句“And although it wasn’t yet fully operated, FAST had already made great discoveries by October 2017.（虽然还没有完全运转起来，到2017年10月FAST已经有了重大发现）”可知，这一段讲述FAST的重大发现。并且其后几句话也是来具体阐述FAST的重大发现的。故选D。

主旨大意题是篇章阅读一个主要的考查方式，段落大意题是其中一种考查形式。段落大意题的主旨主要是要确定好段落中心句。说明文中，段落中心句有可能是段落第一句话，如果第二句话有转折词的话，第二句话就是中心句。确定好中心句后再将中心句的中心词与答案对比，就可以得出答案。例如本题第四题，第四段首句就是含有转折关系词句子，所以主句就是段落中心句。其中的FAST及great discoveries就是关键词，据此我们就可以确定答案为D。所以要破解主旨大意题，同学们首先要学会确定段落主旨句。