可摘局部义齿的Kratochvil分类的核心是强调义齿支持组织的差异，应按照不同的支持形式设计义齿。
A. 对
B. 错
A: Could you do me a favor?B: ________________________
A. Sure. How about tomorrow?
B. Sure I do.
C. Sure. What’s up?
D. Not too well.
A:________________________ [in an elevator]No problem.
A. Have you been here before?
B. Could you please press twelve?
C. Have we met before?
D. Are you a freshman?
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