A:C3H6 与 C5H10
B:C4H8 与 C6H12
C:C3H8 与 C5H12
D:C2H2 与 C6H6
sun is much bigger than moon.
“鱼儿离不开水”,对此最恰当的解释是( )
如果两个相似三角形的相似比是1∶2,那么它们的面积比是()