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- 共用题干 Save Energy At HomeOn the average,Americans waste as much energy as two-thirds of the worlds p...
- 共用题干 Wide World of RobotsEngineers who build and program robots have fascinating jobs. These resear...
- 共用题干 第二篇Florence Nightingale Florence Nightingale was born in Florence , ltaly , while her wealthy ...
- An Essential Scientific Process All life on the earth depends upon green plants. Using sunlight, th...
- 共用题干 Save Energy At HomeOn the average,Americans waste as much energy as two-thirds of the worlds p...
- 共用题干 Ants Have Big Impact on Environment as“Ecosystem Engineers”Research by the University of Exete...
- We almost ran into a Rolls一Royce that pulled out in front of us without signaling.
- 共用题干 Animals “Sixth Sense”A tsunami（海啸）was triggered（引发）by an earthquake in the Indian Ocean in Dec...
- We had trouble finding a pure water supply.
- 共用题干 EarthquakeHow does an earthquake start?What makes an earthquake happen? The rock of the earths...