题目内容
已知A={2,5,6,9},B={4,5,7,9},则A∩B等于
{5,9}
{2,4,6,7}
{2,4,5,6,7,9}
{2,4,5,5,6,7,9}
已知集合A={2,5,6},B={3,5},则集合A∪B=________.