【多选题】【消耗次数:1】
设格中元素a,b,c,则满足下面哪些性质:
a?(b*c) ≤ (a?b)* (a?c);
a?(b*c) ≥ (a?b)* (a?c);
A*(b?c) ≥ (a*b)? (a*c);
a * (a ? (b*c)) = a。
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【多选题】 格中元素a,b,c,若a ≤ b,则满足下面哪些性质:
①  a * b = a;
②  a * (a ? b) = a;
③  a?(c*b) ≤ (a?c)*b;
④  a?(c*b) ≥ (a?c)*b。
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③  a*c ≤ b?d;
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③  a?(c*b) ≤ (a?c)*b;
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