A:①
B:②
C:③
D:④
已知n正整数,且x2n=2,求(3x3n)2﹣4(x2)2n的值.
- Who gets up ______ in your family?
- My mother. She has to cook breakfast for my father and me.
①汽油以及柴油价格下调,将使物流企业的生产成本有所降低
②降低企业社保缴费率和住房公积金缴存比例,有利于企业发展
③电信企业下调国际及港澳台漫游流量资费,将使该企业利润下降
④营业税改增值税试点扩大到房地产业.有利于去库存,提高商品房价值