题目

______, the students in Shiyan High School do about 3000 meters every day, ______ their parents may do far more than that.A.In theory; but B.On average; whileC.In particular; when D.In response; where 答案:【答案】B【解析】考查介词短语与并列连词。句意:平均,实验高中的学生每天走路3000米,而他们的家长走路比那多的多。In theory理论上;On average平均;In particular尤其,特别;In response作出回答。前后两句话之间是并列对比关系,but(但是);while(然而);when(当……的时候);where(在哪儿),(2011?丰台区一模)下列说法中正确的是(  )A.通电螺线管周围存在磁场B.电磁波传播的速度是3×108m/sC.电动机是利用电磁感应现象制成的D.发电机是将电能转化为机械能
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