某学生要邀请10位同学中的4位参加一项活动,其中有2位同学要么都请,要么都不请,则不同的邀请方法有（）种
A.48
B.60
C.72
D.98
E.120

明、清时期的“三法司”包括（　　）。
A.大理寺
B.刑部
C.都察院
D.御史台

论证有效性分析:分析下述论证中存在的缺陷和漏洞,选择若干要点,写一篇600字左右的文章,对该论证的有效性进行分析和评论。（论证有效性分析的一般要点是:概念特别是核心概念的界定和使用是否准确并前后一致,有无各种明显的逻辑错误,论证的论据是否成立并支持结论,结论成立的条件是否充分等。）近日,由共享单车引发的社会问题又进入新闻媒体的报道中:云南有一小学生可以凭借“听声音”破解单车密码锁。除了社会问题外,共享单车的安全漏洞也浮出水面。在5月14日举行的国际安全极客大赛GeekPwn年中赛上,一位女程序员演示了不到一分钟攻破共事单车的高危漏洞并直接获取用户的个人资料、免费骑车的过程。普通的小学生、程序员都能做到这些,我们有理由相信一传十、十传百,在不久的将来大家都能做到这些。那么,共享单车真的还能继续正常运营吗?共享单车暴露出来的一些问题,是无法回避也是不能回避的。前车之鉴,后事之师。在共享单车尚未处理好自己的摊子时,新的“共享”事物,如共享汽车、共享KTV、共享充电宝以及共享篮球等却都已跃跃欲试,摩拳擦掌准备大干一场了。共享单车都存在如此多的问題,难道这些新兴的共享事物不会出现问题吗?它们是否能够避免出现共享单车类似的弊病?如果不能解决,单纯只是因为“共享经济大有搞头”就开展业务,那是不是急了些?共享经济被支持、提倡,无不得益于当下全国都在鼓励大众创业、万众创新,我们总不能做因噎废食的事。可是,漠视可能出现的问题,不看看前车之鉴,一味埋头朝前跑,是不是不理智呢?将来,如果出现了问题,冷不丁“摔一跤”,这些一拥而上的共享企业就爬不起来了。共享经济的脚步不妨“慢一点”。磨刀不误砍柴工。现在的“共享经济”需要的就是“磨刀”的功夫。共享企业只要有了防患于未然的意识,意识到可出现的“共享”病症,未来就能获得成功。一拥而上地发展各类“共享”,恐怕过于急躁,最终利益肯定会受损。

已知某公司男员工的平均年龄和女员工的平均年龄，则能确定该公司员工的平均年龄（1）已知该公司员工的人数（2）已知该公司男女员工的人数之比
A.条件（1）充分，但条件（2）不充分
B.条件（2）充分，但条件（1）不充分
C.条件（1）和条件（2）单独都不充分，但条件（1）和条件（2）联合起来充分
D.条件（1）充分，条件（2）也充分
E.条件（1）和条件（2）单独都不充分，条件（1）和条件（2）联合起来也不充分

根据我国现行宪法和法律的规定，我国的兵役制度是()。
A.志愿兵役制
B.义务兵役制
C.义务兵役制与志愿兵役制相结合，以义务兵役制为主
D.义务兵役制与志愿兵役制相结合，以志愿兵役制为主

Wanen Buffett,who will host Berkshire Hathaway's annual shareholders'meeting on May 3rd,is an icon of American capitalism.At 83,he also epitomhes a sLriking demographic 1:for highly skilled people to go on working well int0 2 was once thought to be old age.Across the rich world,well-educated people 3 work longer than the less-skilled.Some 65%of American men aged 62-74 with a professional deUee are in the 4,compared with 3290 0f men with only a high-school certificate.In the European Union Lhe pattern is similar.This 5 is part of a deepening divide between the well-educated 6 and the unskiUed poor that is slicing 7 all age groups.Rapid innovation has raised the incomes of the highly skilled while 8 those of the unskilled.Those 8t the cop are working longer hours each year than those at the bottom.9 the well-qualified are extending their working lives,compared with those ofless-educated people.The 10,for indrviduals and society,are profound.The world is on the 11 rise in the number of old people,and they will live longer than ever before.12 the next 20 years the global population of those aged 65 or more will almost double,from 600m to 1.1 billion.The 13 of the 20th century,when greater longevity translated into more years in retirement 14 more years at work,has persuaded many observers that this shift will 15 slower economic growth and"secular stagnation",while the 16 ranks of pensioners will bust government budgets.But the notion of a sharp division between the working young and the 17 old misses a new trend,the 18 gap between the skilled and the unskilled.Employment rates are falling among younger unskiUed people,19 0lder skilled folk are working longer.The divide is most extreme in America,where well-educated baby-boomers are 20 retirement while many less-skilled youn-ger people have dropped out of the workforce.6选？
A.healthy
B.well-off
C.bright
D.elderly