今年爸爸和小明的年龄相加是42岁,10年以后爸爸比小明大20岁,问现在爸爸的年龄是多少 ( )
A.35
B.29
C.31
D.40
参考答案:C
—Li Mei usually helps others, ________?
—Yes, she is kind-hearted. [ ]
A. does she
B. is she
C. doesn't she
北极熊白色体毛下厚厚的脂肪属于()
A.神经组织
B.结缔组织
C.肌肉组织
D.上皮组织