题目内容

The Dragon Boat Festival falls on the third day of the fifth lunar month and is celebrated everywhere in China.

A. 对
B. 错

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The first day of the Water-Splashing Festival is the eve.

A. 对
B. 错

The Torch Festival is a traditional festival of the Yao people.

A. 对
B. 错

某个集合的基数为10,可以构成( )个子集。

A. 10
B. 20
C. 100
D. 2的10次方

设A,B是两个集合,A={1,2,3,4},B={2,3,5},则A-B= ()

A. {1,4}
B. {2,3}
C. {1,2,3,4,5}
D. {2,5}

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