土地使用权出让，可以采取( )方式。 A．国家行政划拨与有偿出让结合 B．拍卖、招

国家统一的会计制度，是指国务院财政部门根据《会计法》制定的关于会计核算、会计监督、会计机构和会计人员以及会计工作管理的制度。()

A．正确

B．错误

在1L含0.1 mol NaAlO₂和0.1 mol Ba(OH)₂的混合溶液中，逐滴加入浓度为0.1 mol·L^-1的H₂SO₄溶液，所产生的沉淀的物质的量和所加入硫酸溶液的体积关系可用下列图像表示的是（   ）

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Java的图形界面技术经历了两个发展阶段，分别通过提供AWT开发包和 【13】 开发包来体现。

在逆流操作的吸收塔中，若吸收剂进塔浓度x₂降低，其它操作条件不变，则出塔气体组成y₂（），出塔液体组成x₁（），回收率（）。