《2025年高考模拟试题汇编高中英语》

D
With the fast development of astronomy, astronomers are eager to find a hint of the familiar: planets that resemble Earth. By pushing technology to the limits, astronomers are rapidly approaching the day when they can find another Earth.
The most direct approach is to take a picture of it with a telescope. However, a more effective way is to use “the Doppler technique”. This involves analyzing starlight for evidence that the star’s movement is affected by the gravitational pull of a planet. Nowadays, astronomers can tell when a planet is pulling its star by only one meter a second—about human walking speed. That’s enough to detect a giant planet in a big orbit, or a small planet if it’s close to its star.
Another approach is to watch a star for a slight dip in its brightness. This occurs when an orbiting planet passes in front of the star and blocks part of its light. At most, a tenth of all planetary systems are oriented so that these mini - eclipses (日食, 月食)—called transits (凌日)—are visible from Earth. So, astronomers have to monitor a lot of stars to capture just a few transits.
The dream of astronomers is to discover a rocky planet roughly the size of Earth orbiting in a habitable zone, one that is neither too hot nor too cold to support life. If they succeed, they will have found what biologists believe could be a promising residence for life.
The best places to look may be dwarf stars. Smaller than the sun, dwarf stars are plentiful; seven of the ten stars nearest to Earth are dwarf stars. They also provide a steady supply of sunlight to any life - bearing planets within their habitable zone. Additionally, dwarf stars are dim, so the habitable zone lies closer in. If the planet is closer to the star, it’s easier for astronomers to detect a transit observation. A close - in planet also has a stronger pull on its star. That makes it easier to detect with the Doppler method.
32.According to Paragraph two, astronomers analyze starlight with the aim of finding ________.
A. where we can detect a giant orbit
B. why a small planet is close to its stars
C. whether the motion of the stars is changed
D. how strong the power of the gravitational pull is
33.Why do astronomers have to monitor a lot of stars to capture transits?
A. Transits last a very short period of time.
B. Most planetary systems don’t have transits.
C. Transits only occur for a small number of stars.
D. No more than 10% planetary systems have visible transits from Earth.
34.Dwarf stars may be good places to spot Earth - like planets because ________.
A. dwarf stars are limited in number
B. their planets are close to the Earth
C. the closeness of the habitable zone to dwarf stars aids detection
D. the brightness of dwarf stars to Earth improves their visibility
35.What is the author’s attitude to the discovery of Earth - like planets?
A. Confident.
B. Suspicious.
C. Ambiguous.
D. Unconcerned.

答案： D
32.C 细节理解题
【定位句】This involves analyzing starlight for evidence that the star’s movement is affected by the gravitational pull of a planet. (第二段第三句)
【解析】根据定位句可知，天文学家分析星光的目的是发现恒星的运动是否受行星引力的影响而发生了变化。故选 C。
33.D 细节理解题
【定位句】At most, a tenth of all planetary systems are oriented so that these mini - eclipses(日食，月食)—called transits(凌日)—are visible from Earth. (第三段第三句)
【解析】该题问的是为什么天文学家要监测很多的恒星来捕捉凌日。根据定位句可知，因为最多只有十分之一的行星系统会出现地球上可见的凌日，所以天文学家需要监测很多恒星以捕捉凌日现象。故选 D。
34.C 推理判断题
【解析】通读第五段尤其是最后四句可知，矮星很暗，所以离宜居带更近。如果宜居带内的行星离恒星更近，天文学家就更容易探测到凌日现象。近距离的行星对其恒星也有更强的引力，这使得用多普勒方法探测更容易。故选 C。
35.A 观点态度题
【解析】通读全文尤其是第一段可知，随着天文学的发展，科学家们迫切地想要发现类地行星的踪迹。通过不断地推进前沿科学，天文学家们正在快速接近找到另一个地球的那天。由此可推知，作者对找到类地行星很有信心。故选 A。