《西斯廷圣母》是意大利文艺复兴时期极富盛名的油画，塑造了端庄、娴静、温婉的圣母形象，体现了画家的美学追求。该油画的作者是（  ）

避孕原理为抑制排卵的避孕方法是（）

与α受体拮抗剂无相互作用的药物是（    ）

中华民国南京国民政府民法的立法体系原则是（   ）。

教师按一定的教学要求提出问题让学生回答，通过问答、对话的形式引导学生思考、探究或获取知识，促进学生智能发展的教学方法是(    )（易混）

关于乙酰半胱氨酸的说法，错误的是（）

在我国法律体系中，按照一定的标准和原则所制定的同类法律规范的总称为(　　)。

性微寒的行气药是（    ）

教育制度的类型是多种多样的，可以从多种角度进行划分。下面从教育阶段角度划分的一种教育制度是（　　）。

债券票面利率是债券年利息与债券面值的比率，又称为（  ）。

Passage2

     Old stereotypes diehard. Picture a video-game player and you will likely imagine a teenage boy, byhimself, compulsively hammering away at a game involving rayguns and aliensthat splatter when blasted. Ten years ago that might have borne some relationto reality. But today a gamer is as likely to be a middle-aged commuterplaying  "Angry Birds" on hersmartphone. In America, the biggest market, the average game-player is 37 yearsold. Two-fifths are female.

     Over the past tenyears the video-game industry has grown from a small business to a huge, mainstreamone. With global sales of $56 billion in 2010, it is more than twice the sizeof the recorded-music industry. Despite the downturn, it is growing by almost9% a year.

    Is this success dueto luck or skill? The answer matters, because the rest of the entertainmentindustry has tended to treat gaming as being a lucky beneficiary of broadertechnological changes. Video gaming, unlike music, film or television, had theluck to be born digital. In fact, there is plenty  for old media to learn.

    Video games have certainly been swept along bytwo forces: demography and technology. The first gaming generation-the childrenof the 1970s and early 1980s-is now over 30. Many still love gaming, and canafford to spend far more on it now. Meanwhile rapid improvements in computingpower have allowed game designers to offer experiences that are now often morecinematic than the cinema.

     But even grantedthis good fortune, the game-makers have been clever. They have reached out tonew customers with new methods. They have branched out into education,corporate training and even warfare, and have embraced digital downloads andmobile devices with enthusiasm. Though big-budget games are still popular, muchof the growth now comes from  "casual" games that are simple, cheap and playable in shortbursts on mobile phones or in web browsers.

     The industry hasexcelled in a particular area-pricing. In an era when people are disinclined topay for content on the web, games publishers were quick to develop"freemium" models, where you rely on non-paying customers to build anaudience and then extract cash only from a fanatical few.

Asgaming comes to be seen as just another medium, its tech-savvy approachcould provide awelcome shot in the arm for existing media groups.

One special factor of the success of video games is that_____.