—_______.
A:Not at all
B:You should go to a doctor
C:I'm sorry
D:You shouldn't tell it to your mother
为了清晰地观察到物质的溶解过程,我们用一种____的物质代替食盐做溶解实验。
用514、78和1120分别去除某分数,所得的商是整数,这个分数最小是____ .