谷壳含有()和()等,在酿酒过程中生成糠醛和甲醇等有害物质。
参考答案:多缩戊糖;果胶质
—" _____ are you leaving for Shanghai?"
—"In two days." [ ]
A. How often
B. How long
C. How soon
D. When
御花园位于紫禁城何处?