A:2:7:2:7
B:2:2:7:7
C:2:7:7:2
D:2:3:4:5
“酒是陈的香”,其原因之一是酒在储存过程中生成了具有香味的乙酸乙酯,在实验室我们也可以用如图所示的装罝制取乙酸乙酯.
Why doesn't the woman choose the black dress?