2. 公务员
  3. "Mike’s iPhone he just bought yesterday is expensive. " ______ "Mike has an iPhone. "

"Mike’s iPhone he just bought yesterday is expensive. " ______ "Mike has an iPhone. "

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问题 "Mike’s iPhone he just bought yesterday is expensive. " ______ "Mike has an iPhone. "
选项 A、is synonymous with
B、is inconsistent with
C、entails
D、presupposes
答案D
解析 句子之间主要存在以下四种意义关系：(1)X与Y同义(X is synonymous with Y)：从真值条件的角度来看，如果X为真，Y就为真；如果X为假，那么Y也为假。
(2)X与Y不一致(X is inconsistent with Y)：如果X为真，Y就为假；如果X为假，Y就为真。
(3)X蕴含Y(X entails Y／Y is an entailment of X)：如果X为真，Y一定为真，例如，如果他去过北京，他就一定去过中国；如果X为假，Y有可能为真，有可能为假，例如，如果他没去过北京，他可能去过中国，也有可能没有去过。
(4)X预设Y(Y是X的先决条件)[X presupposes Y／Y is a prerequisite of X]：如果X为真，Y一定为真，例如在本题中，迈克昨天买的iPhone昂贵，他一定拥有一台iPhone；如果X为假，Y仍然为真，例如，如果迈克的iPhone不昂贵，他还是拥有一台iPhone。所以本题选择D。
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