A：My neighborhood has a food market.
B：My neighborhood doesn't have a food market.
C：There isn't a food market in my neighborhood.
关于阿基米德表述不正确的是( )
经测定某中性溶液中含有Mg2+、Al3+、NO3﹣、SO42﹣四种离子组成，其中Mg2+、Al3+、SO42﹣的个数比不可能为（ ）
下列关于香港回归的表述中不正确的是（ ）
