题目

患尿毒症的人要定期到医院去做肾透析,目的是为了排出 ( ) A.二氧化碳              B.水 C.无机盐                    D.尿素 答案：DEvery ________ in the sea is affected by the pollution.A.animal livelyB.animal liveC.animal aliveD.alive animal