這四個罐子上的線索有一個是真的, 請問哪一瓶是真的裝了鹽?
A. 這是鹽. B. 這是鹽. C. 這是糖. D. 鹽不在B裡.
On April Fool’s
Day, your teenaged son replaces the salt in three of your four salt shakers
with sugar. But he also leaves messages on each.
If only one of these inscriptions is true, which shaker still contains salt?
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答案: C
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