February的缩写形式是:Febr.
____改为____
A. My father is a teacher.
B. I'm very happy.
C. This is Lily's family.
D. My sister is very tall.
E. I am a student.
下图为“某月近地面平均气压沿两条纬线的变化图”,读图完成第下列各题。
设集合U={1,2,3,4,5},A={1,2,3},则∁UA=( )
形成尿液的基本单位是( )