男性，19岁，发热、反复感染、周身乏力2个月，骨髓检查确诊为急性白血病，有助于白血病分类鉴别的检查是

班主任产生于（　　）。

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______.

语言与语言的碰撞和融合是文化交往的一部分。现今世界，这种交往正在变得更频繁、更迅捷，然而从一种语言本身来看，它总是既要保持过去的精华，又要吸收外来因素，否则无法传达新的现实。在这段话里，“语言与语言的碰撞和融合”是指（）。

某公司在融资前，企业持股数量为100 000股。前轮投资者以每股2元的价格购买了30 000股，后轮投资者以每股1元的价格购买了20 000股。在完全棘轮条款下，企业需向前轮投资者补偿的股票数量为（  ）股。

下列选项中，不适合作为《大家动手做条龙》一课教学目标的是（）

“经常用绘画、捏泥、手工制作等多种方式表现自己的所见所想”这一目标适合的年龄班是(    )。

在某幼儿园，当王老师刚刚走上教育工作岗位的时候，他教的班级有个淘气的幼儿。每当教师讲课时，他总爱低头玩他桌子上放的“宝贝”横笛，有时候还会轻轻地吹出“嘟——嘟——”声。对此，最恰当的处理方式是（  ）。

著名科学家钱学森说：“现代科学技术研究不能靠一个人的劳动”“95%的科学技术都靠集体。”“单干是没有生命力的。”这表明，教师在工作当中，应当（  ）

下列各项中，属于投资活动产生的现金流量项目的是（  ）。

下列关于常（负）压燃气锅炉房的平面布置的说法中，不符合现行国家标准《建筑防火通用规范》的是（   ）。