影响标准化的经济因素主要有( )
A．市场容量
B．生产成本
C．产品产量
D．产品质量
E．产品利润
参考答案：A,B
—My father has decided to ______ smoking.
--That’s good news for us.
A．give up
B．give out
C．give in
D．give to
— People never use Mr, Mrs or Miss before their first names, do they?
— , they only use them before their family names. [ ]
A. Yes, they don't
B. Yes, they do
C. No, they don't
D. No, they do
