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- 共用题干 The FamilyThe structure of a family takes different forms around the world and even in the sam...
- 共用题干 EarthquakeHow does an earthquake start?What makes an earthquake happen? The rock of the earths...
- 共用题干 Germs（细菌）on BanknotesPeople in different countries use different types of money:yuan in China,...
- 共用题干 More Than 8 Hours Sleep Too Much of a Good Thing1 Although the dangers of too little sleep are...
- 共用题干 Sharks Perform a Service for Earths WatersIt is hard to get people to think of sharks as anyth...
- 共用题干 第三篇Human Space ExplorationWhile scientists are searching the cause of the Columbia disaster,NA...
- He inspired many young people to take up the sport.
- 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 Chimpanzees1 Chimpanzees（黑猩猩）will soon be extinct（灭绝）.If the present rate of hunting and habit...
- I tried to detach myself from the reality of these terrible events.