更多"[不定项选择题]Moods, say the experts, are"的相关试题:
[不定项选择题]Moods, say the experts, are feelings that are likely to become fixed, having effects on one′ s out-look ( way of looking at things ) for hours, days or even weeks. That′ s great if your mood is a pleasant one, but a problem if you are sad, anxious, angry or simply lonely.
Perhaps the best way to deal with such moods is to talk them out; sometimes, though, there is no one to listen. Modern pharmacology (药物学) offers a lot tranquilizers ( 镇定剂 ) and anti-anxiety drugs. What many people don′ t realize, however, is that scientists have discovered the effectiveness of several non-drug methods to make you free from an unwanted mood. These can be just as useful as drugs, and have the added benefit of being nonpoisonous. So next time you feel out of sorts, don′ t head for the drug store--try the following method.
Of all the mood-changing self-help techniques, aerobic exercise seems to be the best cure for a bad mood. "If you could keep the exercise, you′ d be in high spirits, "says Kathryn Lance, author of Running for Health and Beauty.
Researchers have explained biochemical and various other changes that make exercise compare favorably to drugs as mood-raiser. Physical work such as housework, however, does little. The key is aerobic exercise--running, cycling, walking, swimming, or other repetitive and sustained activities that increase the heart rate and circulation (循环), and improve the body′ s use of oxygen. Do them for at least 20 minutes a time, three to five times a week.
Which of the following best describes the organization of this passage?
A.An exercise and its importance are explained.
B.A problem is examined and solutions are given.
C.Two different views of a problem are presented.
D.Recent developments in medicine are described.
[不定项选择题]It would be all too easy to say that Facebook’s market meltdown is coming to an end.After all,Mark Zuckerberg’s social
network burned as much as$50 billion of shareholders’wealth in just a couple months.To put that in context,since its debut(初次登台)on NASDAQ in May,Facebook has lost value nearly equal to Yahoo,AOL,Zynga,Yelp,Pandora,Open Table,
Group on,LinkedIn,and Angie's List combined,plus that of the bulk of the publicly traded newspaper industry:
As shocking as this utter failure may be to the nearly 1 billion faithful Facebook users around the world,it’s no surprise to
anyone who read the initial public offering(IPO)prospectus(首次公开募股说明书).Worse still,all the crises that emerged
when the company debuted-overpriced shares,poor corporate governance,huge challenges to the core business,and a
damaged brand-remain today.Facebook looks like a prime example of what Wall Street calls a falling knife-that is,one that
can cost investors their fingers if they try to catch it.
Start with the valuation.To justify a stock price close to the lower end of the projected range in the IPO,say$28 a share,Facebook’s future growth would have needed to match that of Google seven years earlier.That would have required
increasing revenue by some 80 percent annually and maintaining high profit margins all the while.
That’s not happening.In the first half of 2012,Facebook reported revenue of$2.24 billion,up 38 percent from the same
period in 2011.At the same time,the company’s costs surged to$2.6 billion in the six-month period.
This so-so performance reflects the Achilles’heel of Facebook’s business model,which the company clearly stated in a
list of risk factors associated with its IPO:it hasn’t yet figured out how to advertise effectively on mobile devices,The number
of Facebook users accessing the site on their phones surged by 67 percent to 543 million in the last quarter,or more than
half its customer base.
Numbers are only part of the problem.The mounting pile of failure creates a negative feedback loop that threatens Facebook’s future in other ways.Indeed,the more Facebook’s disappointment in the market is catalogued,the worse Facebook’s
image becomes.Not only does that threaten to rub off on users,it’s bad for recruitment and retention of talented hackers,who are the lifeblood of Zuckerberg’s creation.
Yet the brilliant CEO can ignore the sadness and complaints of his shareholders thanks to the super-voting stock he
holds.This arrangement also was fully disclosed at the time of the offering.It’s a pity so few investors apparently bothered to
do their homework.
What does the author imply in the last paragraph 《》（）
A.Sleeplessness does harm to people’s health.
B.Few people really know the importance of sleep.
C.It is important to study our sleep patterns.
D.Average people probably sleep less than the rich.
[不定项选择题]共用题干
A企业为矿山企业，地下金属矿山采用竖井、斜井、斜坡道联合开拓方式和下行分层胶结充填采矿方法。2012年5月9日8时，司机甲和司机乙开始在井下1150工作面进行铲装作业。9时，甲使用的铲装车出现故障，无法正常作业，于是来到休息室休息。10时30分，乙完成自己的铲装工作量后也来到休息室。甲见乙来到休息室，便借用了乙的铲装车进行作业。11时甲发现铲装车的监控系统显示排气管温度已达到170℃，便停止铲装作业，将车开到斜坡道岔口处熄火降温。11时10分，甲再次启动乙的铲装车时，发现发动机下方着火。甲取下车载灭火器灭火，火未灭掉，甲于是去叫休息中的乙，并和乙一起从休息室拿了两个大容量灭火器进行灭火，但由于已引燃井下临时加油罐中的柴油，火焰蔓延，无法扑灭。11时30分，甲将火情报告给在附近的工区值班员丙，丙向调度室作了电话报告，调度员丁接到丙的火情报告后进行了记录，但未向主管领导报告，也未向消防部门报警。丙向调度室报告火情后，与甲各拿一个灭火器赶往着火现场灭火，甲、乙、丙看到火势猛烈、冒出阵阵浓烟，并感觉呼吸困难，遂于12时返回地面。由于未能及时控制火势，造成着火铲装车下风侧巷道和工作面的作业人员17人死亡、2人重伤，直接经济损失9421万元。事故调查确认该起事故的过程为：铲装车发动机长时间工作，排气管温度过高；铲装车油管泄漏，渗漏的柴油因高温烘烤在发动机周围形成可燃气体，重新启动时产生的火花点燃可燃气体，引燃临时加油罐内的柴油，燃烧产生大量有毒有害气体，造成人员中毒或窒息。
根据以上场景，回答下列问题（共14分，每题2分，1～3题为单选题，4～7题为多选题）：
为防止此类事故再次发生，A企业应采取预防措施包括()
A.改变开拓方式
B.改变采矿方法
C.进行全员安全教育培训
D.针对此类事故组织应急演练
E.排查治理铲装车的火灾隐患
