题目内容

He’s too-----to share his food with me.

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She her friend’s birthday party.

(2)若AB = ∅且C ⊂ A,则BC = ∅;

A. 对
B. 错

(3)(A∪B ) − B = A;

A. 对
B. 错

(4)(A − B )∪B = A.

A. 对
B. 错