衡量一个企业的产品组合状况的指标有( )。
A．宽度
B．深度
C．密度
D．关联度
参考答案：A,B,D
The twins in Dalian last year. They here now. [ ]
A. are; were
B. were; are
C. was; are
D. were; was
“十九畏”中，人参“畏”的是（）
A．三棱
B．朴硝
C．硫黄
D．五灵脂
E．密陀僧
