分解因式:a4-8a2+16=______.
a4-8a2+16=(a2)2-8a2+42=(a2-4)2.
故答案为:(a-2)2(a+4)2.
I’m hungry. I_____ breakfast yet.
A.didn’t have
B.had
C.haven’t had
D.haven’t have
企业保持较高的营运资金持有量,则可以降低风险,但也会降低企业的收益性;而流动资产所占比重偏低,会使企业收益率较高,但又会加大企业的风险。()