(A)

    Lisa is a teacher and her husband is a doctor. They are both very 1and have no time to do all the housework. So she asks her children to do some 2 according to their age. She asks John, the elder brother in the 3, to do the dishes. It is an easy chore 4 the 15-year-old boy. And she asks Dave, her 5 son, to take the dog for a walk every evening. The two boys also have to help 6 the car when it is dirty. And they clean their tables, 7 their beds every day and 8 food in the market every Sunday morning. The boys can cook easy meals 9 their parents are not at home.

    The family of 10 live in a big house 11they do all the housework by themselves. Lisa says, “When I was young, my father wanted us 12 with housework and learn how to 13 ourselves. Now I'm doing it to my kids.” John says, “Doing chores is 14.You can learn important life 15 and responsibility (责任).”

如图是某学校一名篮球运动员在五场比赛中所得分数的茎叶图，则该运动员在这五场比赛中得分的方差为____

阅读以下材料，回答问题。

材料一

19世纪中期以前，英国国家机器并不强大。中产阶级和它的大多数知识分子普遍希望国家无为而治，力主最好的政府是管事最少的政府。……（19世纪中期以后），内阁和国会的关系逐渐发生变化，并倒换过来，不再是议会领导内阁而是内阁的权力逐渐凌驾于议会之上。虽然议会具有最高地位的原则仍被认为是英国宪法的基石，但议会权力在多数场合已流于形式，实际权力落在内阁首相及其领导的大臣手中。

——丁建弘主编《发达国家的现代化道路》

材料二

20世纪初美国兴起的进步主义者提出解决社会问题的方案：第一是治标的，直接援助那些底层的贫困者，开设救济院，帮助他们解决最基本的生活问题。第二就是要从根本上来治。美国人以前警惕的一直是政府权力被滥用，对民主制度造成威胁。现在他们发现威胁更多地来自垄断资本，而能遏制这一巨怪的却只有政府了，所以不能不转向政府寻求解决危机的手段。

——钱满素《美国自由主义的历史变迁》

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