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單項(xiàng)式的系數(shù)是________，次數(shù)是________．

若a＝2b＋3，則整式的值=________．

多項(xiàng)式是關(guān)于x的二次三項(xiàng)式，則a與b的差的相反數(shù)是______．

(n為正整數(shù))是________次________項(xiàng)式．

如果多項(xiàng)式不含ab項(xiàng)，則k＝________，該多項(xiàng)式是________次________項(xiàng)式．

如果是關(guān)于x，y的六次單項(xiàng)式，則應(yīng)滿足________且n＝________．

只含字母y的五次多項(xiàng)式最多有________項(xiàng)，最少有________項(xiàng)．