检测苯甲酸山梨酸的水浴温度是（）。
A、68℃
B、70℃
C、72℃
D、80℃
参考答案：B
The last time they had great fun was_________ they were leaving college. [ ]
A. where
B. how
C. when
D. why
鲜或干的大黄、籽黄
