等价交换是价值规律的表现形式。 [ ]
×
一组数据2，3，2，3，5的方差是 [ ]
A.6
B.3
C.1.2
D.2
–I am twelve and I like English.
-- Oh, really? I am twelve and I like English.
A．also; also
B．too; too
C．also; too
D．too; also
