【单选题】Senator Green argues that replacing the income tax with a national sales tax would increase the level of output. Senator Brown objects that this policy would benefit the rich at the expense of the po...
A.
Both Senators’ arguments are primarily about equality.
B.
Both Senators’ arguments are primarily about efficiency.
C.
Green’s argument is primarily about equality, while Brown’s argument is primarily about efficiency
D.
Green’s argument is primarily about efficiency, while Brown’s argument is primarily about equality
【简答题】(7分)水对于我们的生产和生活都是非常重要的。 (1)现对一杯取自永定河的混浊河水,进行如下图所示的净化操作。 ① ② ③ 图③中所得滤液澄清透明,它(填“是”或“不是”) _______纯水。上图所示的操作中,对水的净化程度最高的操作是(填名称)_______。 (2)右图所示电解水的实验中,试管(填“a”或“b”) 中收集的气体是氧气...