β-葡聚糖经β-葡聚糖酶的作用分解成葡萄糖和低分子β-萄聚糖，可降低麦汁的（），有利于过滤。
参考答案：粘度
—What's your father doing now?
—He ____ the room.
A. cleaned
B. cleans
C. has cleaned
D. is cleaning
××牌方便面，内有面条，刀叉，调味料
