标题: OG11 124【求教!谢谢!】 [打印本页] 作者: cutewen 时间: 2010-4-21 23:21 标题: OG11 124【求教!谢谢!】 Canadian scientists have calculated that one human being should be struck every nine years by a meteorite,while each year 16 buildings can be expected to sustain damage from such objects.
A.Canadian scientists have calculated that one human being should be struck every nine years by a meteorite B.a human being should be struck by a meteorite once in every nine years C.a meteorite will strike one human being once in every nine years D.every nine years a human being will be struck by a mereorite E.every nine years a human being should be struck by a meteorite