选用适当的符号填空：
已知集合A={x丨2x-3＜3x},B={x丨x≥2},则有
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-4（∉）B -3(∉ )A {2}(⊆ )B B( ⊆ )A
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2.已知集合A={x丨x²-1=0}则有
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1( ∈ )A {-1}( ⊆ )A ∅( ⊆ )A {1.-1}( = )A
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3.
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{x丨x是菱形}（ ⊆）{x丨x是平行四边形}
{x丨x是等腰三角形}（⊇ ）{x丨x是等边三角形}
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