分解因式:x2y-y=______.
x2y-y,
=y(x2-1),
=y(x+1)(x-1).
用长4厘米,宽2厘米,高1厘米的长方体木块拼成一个正方体,至少需要用多少个这样的长方体木块?[ ]
A.2
B.4
C.8
D.16
______ you said at the meeting describes a bright future for the company.
A.When
B.How
C.What
D.That