题型：阅读理解 题类：常考题 难易度：普通
吉林省长春市外国语学校2017-2018学年高二上学期英语第一次月考试卷
For years, people have wondered whether there's life on other planets. Scientists may now be closer than ever to answering that question.
Using powerful telescopes, a team of astronomers in South America discovered a new planet, called Proxima b. It circles a star named Proxima Centauri, in the same way Earth circles the sun. Proxima Centauri is the closest star to our solar system.
Scientists believe the new planet has a rocky surface and is similar in size to Earth. More important, they've determined that the distance between Proxima b and its “sun” gives the planet a similar temperature to Earth's.This means it could have liquid water. The presence of water on a planet makes it possible for life to exist there. Scientists refer to planets like Proxima b as “Goldilocks planets” because they are not too hot or too cold, but just right to possibly support life.
Astronomers have found other Goldilocks planets in the past, but none are as close to Earth as Proxima b. Still, the new planet is 4.2 light years from Earth—that is about 25 trillion miles away.
Despite the long distance, astronomers hope to get a much better look at our new-found neighbor one day. But they'll need to wait until more advanced telescopes are developed. They may also send a robotic spacecraft to investigate the planet.
Yellowstone Weather
Yellowstone National Park is at lofty height. Height. Most of the park is above2,275meters.
Yellowstone's weather is unpredictable. In summer, it may be warm and sunny with temperatures in the high 70s. At night in any given month, the temperature may drop close to freezing. So it is best to come prepared for cold evenings and mornings,especially if you are camping or hiking. When you leave your campsite,please leave it prepared for possible thundershower and wind.
A sunny warm day may become fiercely stormy with wind, rain, sleet and sometimes snow. Without enough clothing, an easy day hike or boat trip can turn into a battle for survival.
Seasonal Weather Information | |
Spring Cold and snow continue into May, although temperatures gradually climb. Early in spring, daytime temperatures average in the 40s and 50s; by late May and June, they may reach the 60s and 70s, Nighttime lows fall below freezing. | Summer Daytime temperatures are usually in the 70s ,occasionally reaching the 80s in the lower elevations(高度）. Nights are cool,temperatures may drop in the 40s and 30s―sometimes even the 20s. July and August tend to be somewhat drier, although afternoon thundershowers are common. |
Fall Weather can be pleasant, although temperatures average 10-2 degrees lower than summer readings, Nighttime lows can fall into teens and lower. Snowstorms increase in frequency as the weeks go by or towards the end of the fall season. | Winter Temperatures often stay near zero throughout the day, occasionally reaching high in the 20s. Subzero nighttime lows are common. Annual snowfall averages nearly 150 inches in most of the park. At higher places, 200-400 inches of snow have been recorded. |
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