Scientists are working on programs to predict where and when an earthquake will occur.(翻译)

共用题干Scientists working on a problem do not know a

共用题干Scientists working on a problem do not know a

共用题干Scientists working on a problem do not know a

共用题干Scientists working on a problem do not know a

共用题干Scientists working on a problem do not know a

补全短文(阅读以下材料 回答第46——50题)Scientists working on a pr