—What did you eat last night?
— [ ]
A. Yes, I did.
B. No, I didn't.
C. Hamburgers.
答案:C
食品中亚硫酸盐的定量测定,通常采用盐酸副玫瑰苯胺法。( )
家庭教育的随机性主要表现在:()。
A.灵活分散性
B.潜移默化性
C.多样性
D.间接性