The weight of a male lion can reach 240 kg, _____ an adult man.[]
A:three times the weight of
B:the three times weight of
C:as heavy as three times
D:as three times heavy as
下列图案中中心对称图形有( )
下列区分物质的试剂或方法不正确的是( )
下面两幅图片所反映的现象出现在