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- Ice Cream Taster Has Sweet Job John Harrison has what must be the most wanted job in the Unite...
- 共用题干 Where Has the Salt Come from?Every now and then,we meet a fact about our earth that makes us f...
- 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 Cloning（克隆）:Future Perlect?1 A clone is an exact copy of a plant or animal produced from any o...
- 共用题干 Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where liv...
- 共用题干 You Need Courage!Shortly after I began a career in business,I learned that Carl Weatherup,pres...
- 共用题干 “Liquefaction” Key to Much of Japanese Earthquake DamageThe massive subduction zone earthquake...
- These are the motives for doing it.
- 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 Difference between Man and ComputerWhat makes people different from computer programs?What...