题目

It is said that _______________of confirmed cases(确诊病例) in Beijing _______________over 300 during the past days.A.the number; has reached B.a number; has reachedC.the number; have reached D.a number; have reached 答案：【答案】A【解析】考查主谓一致及常用短语。句意：据说，在过去的几天里，北京的确诊病例数量已经超过了300例。the number of意为：……的数量，作主语时，谓语动词需用单数；a number of意为：大量，许多。作主语时，谓语动词需用复数。根据句意可知，第一空应使使用the number of短语，表示“确诊病根据36×48=1728直接写出得数．0.36×48=360×48=36×0.48=3.6×480=