— _____
— It's an apartment building.
A:What's your home?
B:Where's your house?
C:What kind of house do you live in?
D:Where's the home?
小刚帮妈妈做饭时观察到一些现象,并进行了解释,其中不正确的是()
若同一个圆的内接正三角形、正方形、正六边形的边长分别记作a3,a4,a6,则a3:a4:a6等于( )
现代生物学研究的重要方法是( )