二氧化碳、尿素和多余的水分排出体外的过程叫做______.
人体细胞进行代谢活动,会产生二氧化碳、水、无机盐、尿素等,这些代谢废物排出体外的过程,就称之为排泄.
故答案为:排泄
Lucy listens to radio every day, so she learns the news _____. [ ]
A. at home
B. all over the world
C. at school
D. at the city
线路分隔段