商品房交付使用后，购买人认为主体结构质量不合格的可以向施工单位申请重新核验。( )
参考答案：错
大于0的自然数与它的倒数[ ]
A．成反比例
B．成正比例
C．不成比例
– Have you heard that Tom, along with his parents, ______ to Japan?
-- Really? No wonder I haven’t seen him these days.
A．has been
B．has gone
C．have been
D．have gone
