设集合 A={x∣x>2}A = \{x \mid x > 2\}A={x∣x>2},B={x∣x>1}B = \{x \mid x > 1\}B={x∣x>1}。则“x∈Ax \in Ax∈A”是“x∈Bx \in Bx∈B”的( )