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- Relief workers were shocked by what they saw.
- It is postulated that a cure for the disease will have been found by the year 2000.
- An Essential Scientific Process All life on the earth depends upon green plants. Using sunlight, th...
- 共用题干 Black HolesMost scientists agree that black holes exist but are nearly impossible to locate.A ...
- 共用题干 Save Energy At HomeOn the average,Americans waste as much energy as two-thirds of the worlds p...
- For some obscure reason,the simple game is becoming very popular.
- 共用题干 An Intelligent CarDriving needs sharp eyes, keen ears, quick brain, and coordination（协调）betwee...
- 共用题干 Learn about Light1 .Ancient civilizations were amazed by the existence of light for thousands ...
- 共用题干 Early Ideas about the Universe1 Early man got his ideas about the universe by looking at the s...
- 共用题干 第二篇Florence Nightingale Florence Nightingale was born in Florence , ltaly , while her wealthy ...