已知菱形的两条对角线长分别是6cm和8cm,则周长是( )cm.
20
Read and match. (连线)
twenty eight sixteen fourteen seven
坡屋顶空间不计算建筑面积的净高是小于()。
A.1.20m
B.1.50m
C.2.10m
D.2.00m