— What does your mother do, Li Jie?
— She is a (an) . She teaches (教书) in a high school.
A:office worker
B:doctor
C:nurse
D:teacher
一 Who is that? — .
一个等腰梯形的周长是30厘米,腰长6厘米,高是4厘米,这个梯形的面积是____平方厘米
读图1—1—5,完成下列要求。