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- During the past ten years there have been dramatic changes in the international situation.
- It is postulated that a cure for the disease will have been found by the year 2000.
- 共用题干 Learn about Light1 .Ancient civilizations were amazed by the existence of light for thousands ...
- 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 Unpopular Subjects?Is there a place in todays society for the study of useless subjects in our...
- 共用题干 More Than 8 Hours Sleep Too Much of a Good Thing1 Although the dangers of too little sleep are...
- The storm caused severe damage.
- 共用题干 Black HolesMost scientists agree that black holes exist but are nearly impossible to locate.A ...
- The city has decided to do away with all the old buildings in its center.
- 共用题干 Sharks Perform a Service for Earths WatersIt is hard to get people to think of sharks as anyth...