2. 外语
  3. Astronomy has been a source for myriad ideas influencing every subject. The stars have【B1】since the dawn of man. People have loo

Astronomy has been a source for myriad ideas influencing every subject. The stars have【B1】since the dawn of man. People have loo

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问题 Astronomy has been a source for myriad ideas influencing every subject. The stars have【B1】since the dawn of man. People have looked to the【B2】to determine physical location in the Earth, to【B3】time and to gain spiritual direction. In early【B4】of the Earth, humans had only their five senses to【B5】them. Venturing out at sea would have been impossible if people had not realized that the stars stay【B6】constant in position. Following the stars allowed mankind to【B7】the first system for giving direction. An adventurer could determine what direction they were facing and get a(n)【B8】idea about how far they had to go. Since the beginning, the stars have been used not only【B9】an effective tool for people to【B10】in basic living but also to【B11】undiscovered things about the world. The 17th Century was filled【B12】many discoveries both in astronomy and in mathematics. The astronomers’【B13】of the universe throughout the 17th Century was referred to as the Ptolemaic system. They presumed that all things around the earth were unchanging. Another popular【B14】was the Copernican system. This is where the sun is the center rather than the earth. One of the main scientists during the 17th Century was Galileo. He believed【B15】the Copernican system. When Galileo pointed his telescope to the sky, he【B16】many important scientific discoveries that【B17】the Copernican system. He found that the moon was not a【B18】sphere as thought of in the Ptolemaic system; it had craters and mountains not【B19】to the human eye. He also discovered that the sun had spots. These discoveries all【B20】the Ptolemaic system.
选项 A、risen
B、shone
C、existed
D、descended
答案C
解析 语义衔接题。用排除法，只有选C)existed“存在，有”句意才通顺。文章外头提到了天文学影响了第一门学科，“星星从人类的出现就早已存在了”。risen“升起”；shone“照耀，发光”；descended“下去”。
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