- 搜标题
- 搜题干
- 搜选项
单项选择题
When the truth of sentence (a) guarantees the truth of sentence (b) , and the falsity of sentence (b) guarantees the falsity of sentence (a) , we can say that（）.
A．sentence (a) presupposes sentence (b)
B．sentence (a) entails sentence (b)
C．sentence (a) is inconsistent with sentence (b)
D．sentence (a) contradicts sentence (b)
