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- 共用题干 第二篇Florence Nightingale Florence Nightingale was born in Florence , ltaly , while her wealthy ...
- 共用题干 When Our Eyes Serve Our StomachOur senses arent just delivering a strict view of whats going o...
- 共用题干 The Northern LightsThe Sun is stormy and has its own kind of weather It is so hot and active t...
- 共用题干 Unlocking the Human Genome（基因组）1 A project to unlock secrets一what scientist could resist that ...
- 共用题干 第一篇Sleepless at NightIt was a normal summer night. Humidity（湿气）hung in the thick air.I couldnt...
- 共用题干 New Product Will Save livesDrinking water that looks clean may still contain bugs（虫子）,which ca...
- 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...
- The weather was crisp and clear and you could see the mountains fifty miles away.
- The study also notes a steady decline in the number of college students taking science courses.
- 共用题干 U. S. Scientists Confirm Water on MarsNASA scientists said that Mars was covered once by vast ...