参与黏膜免疫的免疫球蛋白是

兰州牛肉面有一清（汤清）、二白（萝卜白）、三红（辣子油红）、四绿（香菜绿）、五黄（面条黄亮）五大特点。(  )

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.

The phrase "tech-savvy approach" in the last paragraph probably means______.

干洗店会产生空气污染，因此，干洗行业的均衡价格（　　）。

公司制期货交易所的权力机构是（  ）。

创作了荒诞神奇的《爱丽丝漫游奇境记》的作者是英国作家 ( )。

( )是科学理论、创新思维的源泉，是检验真理的试金石，也是青年锻炼成长的有效途径。

对诊断锁肛痔有重要意义的简易方法是（    ）

商业银行全部理财产品投资于非标准化债权类资产的余额在任何时点均不得超过理财产品净资产的（  ），也不得超过本行上一年度审计报告披露总资产的（  ）。

网络生活中要求人们形成道德自律是因为网络生活的（   ）。