如图4所示为两分子系统的势能E。与两分子间距离r的关系曲线。下列说法正确的是(   )。

（  ）要求披露所有可能影响投资者决策的信息，在披露某一具体信息时，必须对该信息的所有重要方面进行充分的披露。

关于双膦酸盐的叙述，错误的是（    ）

为观察流感减毒活疫苗的流行病学效果，获得如下结果级别接种人数病例数接种组2005对照组20050该疫苗的效果指数是(   ) 。

附子理中丸的功能是（）

甲公司按规定最晚应于2022年3月15日缴纳应纳税款400000元，但迟迟未缴。税务机关责令其于当年3月30日前缴纳，并按日加收0.5‰的滞纳金。甲公司直至当年4月25日才将税款缴清。计算甲公司应缴纳滞纳金金额的下列算式中，正确的是（）。

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______.

附合水准路线的闭合差 fh =( )。

慢性支气管炎病变部位是（    ）。

下列说法中，错误的是(  )。

根据现行法律法规和规章，道路运输企业不需要到公安机关办理通行（许可）证的货物是（ ）