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题型:语法填空-短文语填 难度:0.65 引用次数:34 题号:22862431
阅读下面短文,在空白处填入l个适当的单词或括号内单词的正确形式。

A new study suggests Jupiter’s icy moon (卫星) Europa produces much less oxygen than previously thought. The study was based on the data     1     (collect) by NASA’s Juno spacecraft.

The study involved Juno’s instruments measuring levels of oxygen     2     hydrogen molecules (分子) coming from Europa’s atmosphere. The data showed the icy moon produces about 1,000 tons of oxygen every 24 hours. NASA said that would be enough amount     3     (keep) a million humans breathing for a day.

However, the space agency noted those estimates of oxygen were much less than those measured in earlier studies about the moon. Europa is a little     4     (small) than the Earth’s moon. But it is still one of the largest moons in     5     (we) solar system. NASA observations have suggested     6     ocean exists beneath the thick layer of ice on Europa’s surface. Scientists estimate the moon’s ocean may contain a large amount of water,     7     is twice as the Earth’s oceans.

Since Europa was believed to have a large ocean under its surface,     8     (researcher) in the past identified it as a good candidate to hold the right conditions to support some form of life. That data came     9     (main) from telescope observations of oxygen levels existing in the moon’s icy surface. The new lower estimates of oxygen do not support the earlier observations. The team involved in the study said, in the future, more research     10     (need) to confirm the latest findings.

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【推荐1】阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

May 15 (UPI)—China landed a rover (火星车) on the surface of Mars for     1     first time on Saturday, the China     2     (nation) Space Administration announced.

The Tianwen-1 orbiter launched from the island province of Hainan     3     July 23 and entered Mars orbit in February. The rover, Zhurong,     4     is named after the Chinese god of fire, set down on the red planet on Saturday morning.

China is the second country after the United States     5     (place) a rover on the surface of Mars. The former Soviet Union landed a probe on Mars in 1971, but lost contact immediately.

The rover descended (下降) from the orbiter via entry capsule,     6     (lower) by parachute before jettisoning (投弃) its outer shield and using a retrorocket (反向火箭) to land. Geng Yan, with the Lunar Exploration and Space Program Center at the CNSA, said the rover’s descent took about 9 minutes and     7     (perform) autonomously.

“Each step had only one chance, and the actions were     8     (close) linked. If there had been any flaw, the landing     9     (fail),” he told state-run media Xinhua.

The rover will spend three months searching for     10     (sign) of water and ice on Mars.

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【推荐2】阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

Fifty years ago, China successfully launched     1     (it) first satellite, Dongfanghong 1 , and started a new chapter in space exploration.     2    (mark) its 50th anniversary, the China National Space Administration announced the name for the country’s Mars planetary exploration program on April 24.

The mission, Tianwen, got its name from a famous poet, Qu Yuan,    3     wrote the long poem Tianwen. In the poem, Qu raised a series of questions concerning the sky, stars natural phenomena myths and the real world, reflecting his doubts on traditional ideas and his pursuit of truth.

China     4     (make) remarkable progress in space exploration. As early as 1970, China launched its first man-made Earth satellite, becoming the fifth country in the world to launch man- made satellites     5    (independent) . Over the past few years, China’s missions, including the Shenzhou and Chang’e series     6    (design) to explore outer space, expanded mankind’s understanding of Earth and the universe.

This time,     7     Tianwen series will carry out the first Mars exploration mission in 2020.

Experts consider it the start of China’s exploration of Mars,     8    (represent) a milestone for China’s move toward deep space.

Indeed,     9     the name’s deep roots in Chinese traditional culture, it has been widely accepted among the public. Tianwen demonstrates the     10    (determine) and perseverance (坚持不懈) of Chinese people to move further into deep space.

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文章大意:这是一篇说明文。文章讲述了宇宙浩瀚无边,虽然我们发明了望远镜,但是宇宙中有很多地方尚未被探索,我们还有很长的路要走。
【推荐3】阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

How mysterious the night sky is! It     1    (be) an endless source of fantasy since the start of human history. But     2    reality, humans can see very little of the night sky with their eyes. With the development of technology, our power     3    (investigate) and understand space has changed dramatically. The first telescope(望远镜) was invented,     4    increased the power of the human eye. It also enabled us to understand that the universe is far     5    (large) than humans’ previous imagination.

Almost 400 years after the first Earth-based telescope was invented, the Hubble Space Telescope was put into orbit, giving astronomers     6    first beautiful images of our universe. To see even further into the universe, many countries are now engaged in building more advanced telescopes.     7    (current), China operates the world’s most sensitive radio telescope, the FAST telescope. It     8    (complete) in 2016.

    9    (use) radio telescopes, one day we will be able to look back to a time in the very early universe, before the     10    (exist) of light. So much of the universe remains unexplored that we still have a long way to go.

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