下列各式:①1∈{0,1,2};②∅⊆{0,1,2};③{1}∈{0,1,2004};④{0,1,2}⊆{0,1,2};⑤{0,1,2}={2,0,1},其中错误的个数是( ) A.1个 B.2个 C...
2023-02-28 13:40:06 163次 2009-2010学年浙江省杭州市长征中学高一(上)第二次段考数学试卷(解析版) 选择题 反馈错误 加入收藏 正确率 : 100%
题目内容:
下列各式:①1∈{0,1,2};②∅⊆{0,1,2};③{1}∈{0,1,2004};④{0,1,2}⊆{0,1,2};⑤{0,1,2}={2,0,1},其中错误的个数是( )
A.1个
B.2个
C.3个
D.4个
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