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1．After Pluto(冥王星) was found in 1930，people took it as the ninth planet in our solar system(太阳系) ．But it isn’t like other planets．2．It is smaller and has an strange orbit(轨道)．On August 24，scientists said，“Pluto is not a planet．”
About 2500 scientists met in Prague．At first，some of them said that there would be 12 planets in our solar system．In the end，the scientists said that only Mercury，Venus，Edith，Mars，Jupiter，Saturn，Uranus and Neptune are the planets in the solar system．3．Each of these planets its own orbit，and each of the planets is big enough to be a planed．Pluto’s orbit overlaps(交叠)Neptune’s and it is smaller than the other planets．4．So Pluto is classified(分类) as d dwarf (矮行星)，but no longer a planet in the solar system．Students at school will have new schoolbooks to learn the new solar system．
将1处改为同义句，每空一词
Before people ______ Pluto in 1930，there were _______planets in our solar system．
2处It所指为___________
根据3处完成下列句子
Every planet not only has its own ______，but also is ______ enough．
将4处翻译成汉语________________
5．Why is Pluto classified as a dwarf，not a planet?
Because ___________________________．
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1. After Pluto(冥王星) was found in 1930, people took it as the ninth planet in our solar system(太阳系). But it isn’t like other planets. 2.It is smaller and has an strange orbit(轨道). On August 24, scientists said, “ Pluto is not a planet.”
About 2500 scientists met in Prague. At first, some of them said that there would be 12 planets in our solar system. In the end, the scientists said that only Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune are the planets in the solar system. 3. Each of these planets has its own orbit, and each of the planets is big enough to be a planet. Pluto’s orbit overlaps(交叠) Neptune’s and it is smaller than the other planets. 4. So Pluto is classified(分类) as a dwarf(矮行星), but no longer a planet in the solar system. Students at school will have new schoolbooks to learn the new solar system.
1. 将1处改为同义句，每空一词
Before people ___Pluto in 1930, there were ___ planets in our solar system.
2. 2处It所指为_____
3. 根据3处完成下列句子
Every planet not only has its own___, but also is___ enough.
4. 将4处翻译成汉语
________________________________________________________________
87. Why is Pluto classified as a dwarf, not a planet?
Because_____________________________________________________.
查看习题详情和答案>>①After Pluto (冥王星) was found in 1930, people took it as the ninth planet in our solar system(太阳系). But it isn’t like other planets. It is smaller and has an strange orbit(轨道). On August 24,2006， scientists said,“Pluto is not a planet.”
About 2,500 scientists met in Prague（布拉格，捷克首都）. At first, some of them said that there would be 12 planets in our solar system. In the end, the scientists said that only Mercury（水）, Venus（金）, Earth, Mars（火）, Jupiter（木）, Saturn（土）, Uranus（天王）and Neptune（海王）are the planets in the solar system. ②Each of these planets has its own orbit, and of the planets is big enough to be a planet. Pluto’s orbit overlaps (重叠) Neptune’s and it is smaller than the other planets. ③So Pluto is classified(划归/分类) as a dwarf planet (矮行星), but no longer a planet in the solar system.
Students at school will have new schoolbooks to learn the new solar system!
小题1:根据①处完成下面的句子（每空一词）
Before people _______ Pluto in 1930, there were _______ planets in our solar system.
小题2:根据②出完成下面的句子（每空一词）。
Every planet not only has its own _______ , but also is ______ enough.
小题3:将③处译成汉语。
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