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- 共用题干 A Star Is Born1 The VLT (Very Large Telescope) is the worlds largest telescope（望远镜）and is taki...
- 共用题干 U. S. Scientists Confirm Water on MarsNASA scientists said that Mars was covered once by vast ...
- Although I sympathize,I cant really do very much to help.
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...
- 共用题干 第二篇Good Table MannersManners play an important part in making a favorable impression at the di...
- 共用题干 EarthquakeHow does an earthquake start?What makes an earthquake happen? The rock of the earths...
- An Essential Scientific Process All life on the earth depends upon green plants. Using sunlight, th...
- 共用题干 第一篇How Animals Keep WarmMan has invented ways to keep warm,but how do animals defend themselve...
- 共用题干 第三篇Almost Human?Scientists are racing to build the worlds first thinking robot.This is not sci...