Passage 1
Economically speaking,are we better off than we were ten years ago Twenty years ago
In their thirst for evidence on this issue,commentators seized on the recent report by the Census Bureau,which found that average household income rose by 5.2%in 2014.Unfortunately,that conclusion puts too much weight on a useful,but flawed and incomplete,statistic.Among the more significant problems with the Census's measure are that:1）it excludes taxes,transfers,and compensation like employer-provided health insurance;and 2）it is based on surveys rather than data.Even if precisely measured,income data exclude important determinants of economic well-being,such as the hours of work needed to earn that income.
While thinking about the question,we came across a recently published article by Charles Jones and Peter Klenow,which proposes an interesting new measure of economic welfare.While by no means perfect,it is considerably more comprehensive than average income,taking into account not only growth in consumption per person but also changes in working time,life expectancy,and inequality.Moreover,it can be used to assess economic performance both across countries and over time.
The Jones-Klenow method can be illustrated by a cross-country example.Suppose we want to compare the economic welfare of citizens of the U.S.and France in 2005.
In 2005,as the authors observe:real consumption per person in France was only 60%as high as the U.S.,making it appear that Americans were economically much better off than the French on average.However,that comparison omits other relevant factors:leisure time,life expectancy,and economic inequality.The French take longer vacations and retire earlier,so typically work fewer hours;they enjoy a higher life expectancy,presumably reflecting advantages with respect to health care,diet,lifestyle,and the like;and income and consumption are somewhat more equally distributed there than in the U.S.Because of these differences,comparing France's consumption with the U.S.'s overstates the gap in economic welfare.
Similar calculations can be used to compare the U.S.and other countries.For example,this calculation puts economic welfare in the United Kingdom at 97%of U.S.levels,but estimates Mexican well-being at 22%.
The Jones-Klenow measure can also assess an economy's performance over time.According to this measure,as of the early-to-mid-2000s,the U.S.had the highest economic welfare of any large country.Since 2007,economic welfare in the U.S.has continued to improve.However,the pace of improvement has slowed markedly.
Methodologically,the lesson from the Jones-Klenow research is that economic welfare is multi-dimensional.Their approach is flexible enough that in principle other important quality-of-life changes could be incorporated-for example,decreases in total emissions of pollutants and declines in crime rates.
What does the author think of the 2014 report by the Census Bureau （ ）
根据关键词2014和Census Bureau定位至第二段，Unfortunately,that conclusion puts too much weight on a useful,but flawed and incomplete,statistic.不幸的是，这一结论过于强调统计数据，而该数据虽有效，但有缺陷和不完整。该数据有缺陷且不完整，自然是有问题的数据。B项：它反映了经济变化；C项：它证明了福利的改善；D项：它提供了许多值得思考的事情。故本题正确答案选A。
下列关于公司的表述，正确的是（）
以下各项列举了我国常见气象灾害与其发生地区的对应关系，其中正确的一项是（）
根据电视收视率调査，看体育节目的观众中青年人比中老年人要多。
由此可推断出（）
—种海洋蜗牛产生的毒素含有多种蛋白，把其中的一种给老鼠注射后，会使有两星期大或更小的老鼠陷入睡眠状态，而使大一点的老鼠躲藏起来。当老鼠受到突然的严重威胁时，非常小的那些老鼠的反应是呆住，而较大的那些老鼠会逃跑。
以上陈述的事实最有力地支持了以下哪项假说？（）
疾病控制中心对某校髙中三个年级的学生进行抽样做视力状况调查，抽样的方法为分层抽样（按比例抽样），若高中一、二、三年级学生人数分别为626、703、780，样本容量为84，则应从离二年级抽样的学生人数为多少？（）
