与人体排泄无关的器官是（ ）
A：肛门
B：肺
C：皮肤
D：肾脏
—Betty, please put these books in the box.
—But it is ______ now.We have to find another box.
I love pandas because they are so cute and _______.
任何一个区域内，自然环境各要素都是相互联系的，同时影响着当地的人文环境，该甲、乙、丙、丁四个区域的示意图，完成以下小题．
