【简答题】用碘量法测定水中硫化物时,取水样100ml,经预处理后分别测得吸收瓶1消耗Na 2 S 2 O 3 溶液5.35ml,吸收瓶2消耗Na 2 S 2 O 3 溶液8.69ml,空白消耗Na 2 S 2 O 3 溶液9.07ml,已知Na 2 S 2 O 3 标准溶液浓度为0.0098mol/L,硫离子的摩尔质量为16.03,试求水样中硫化物的浓度。
【单选题】Senator Smith wants to increase taxes on people with high incomes and use the money to help the poor. Senator Jones argues that such a tax will discourage successful people from working and will there...
A.
we should agree with Senator Smith.
B.
we should agree with Senator Jones.
C.
a good decision requires that we recognize both viewpoints.
D.
there are no tradeoffs between equity and efficiency.