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- 共用题干 GarlicFrom early times man has used garlic（大蒜）.The Bible speaks of it. The Israelites （古以色列人）w...
- 共用题干 Thirst for OilWorldwide every day,we devour the energy equivalent of about 200 million barrels...
- 共用题干 The iPad1 The iPad is a tablet computer（平板电脑）designed and developed by Apple. It is par-ticula...
- 共用题干 Giant StructuresIt is an impossible task to select the most amazing wonders of the modern worl...
- 共用题干 第二篇A Very Slow RideThe surface of the earth may seem very stable to you.But you might be amaz...
- 共用题干 第二篇Where Have All the Frogs Gone?In the 1980s,scientists around the world began to notice some...
- 共用题干 Learn about Light1 .Ancient civilizations were amazed by the existence of light for thousands ...
- 共用题干 Earth Angels1 Joying Brescia was 8 years old when she noticed that cigarette butts（烟头）were lit...
- 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...
- We had trouble finding a pure water supply.