产品销售费用、管理费用和财务费用构成企业的( )。
A．生产费用
B．期间费用
C．直接费用
D．间接费用
参考答案：B
解不等式：3x-6＜1+7x.
She is making cheap, but stylish clothes. [ ]
A. expert about
B. expert at
C. expert with
D. expert to
