患儿，3岁。舌苔厚腻垢浊不化，状如霉酱，伴便秘腹胀者。其病机是（）
A.寒湿内停
B.宿食内积
C.湿热内蕴
D.脾虚失运
E.心脾积热
参考答案：B
________you want to improve your oral English, you should start speaking English every day. [ ]
A. So long as
B. In order that
C. Even though
D. Now that
食物中果胶含量测定的方法是（）
A.康威氏扩散皿法
B.水蒸汽蒸馏法
C.密度计法
D.重量法
