含有饱和溶解的二氧化碳，有利于啤酒的（）.。
A.发泡性
B.起泡性
C.消暑性
D.通气性
参考答案：B
简述布鲁纳对发现学习条件的认识。
_______ he worked hard, _______ he failed in the exam. [ ]
A. Although, but
B. Though, but
C. Although, /
D. But, although
