搜题请搜索小程序“爱下问搜题”
问题 解答题

有一些故事书，能平均分给2、3、4、5名同学。这些故事书至少有多少本？

答案

60本

单项选择题 A2型题

下列关于疾病年龄分布的论述哪项是错误的（）

A.人群免疫水平是出现疾病年龄分布差异的重要原因

B.暴露致病因子的机会不同可导致出现疾病年龄分布的差异

C.有效的预防接种可改变某些疾病固有的年龄分布特征

D.横断面分析可明确地呈现致病因子与年龄的关系

E.出生队列分析有助于探明年龄、所处时代特点和暴露经历在疾病的变化中的作用
查看答案
单项选择题

Questions 16～20


It is already common knowledge, on the beaches and in the cafes of mainland Europe, that Americans work too hard—just as it is well known on the other side of the Atlantic that Europeans, above all the French and the Germans, are slackers who could do with a bit of America’s vigorous work ethic.
But a new survey suggests that even those vacations American employees do take are rapidly vanishing, to the extent that 40 per cent of workers questioned at the start of the summer said they had no plans to take any holiday at all for the next six months, more than at any time since the late 1970s.
It is probably mere coincidence that George W. Bush, one of the few Americans who has been known to enjoy a French-style month off during August, cut back his holiday in Texas to a fortnight. But the survey by the Conference Board research group, along with other recent statistics, suggests an epidemic of overwork among ordinary Americans.
A quarter of people employed in the private sector in the US get no paid vacation at all, according to government figures. Unlike almost all other industrialized nations, including Britain, American employers do not have to give paid holidays.
The average American gets a little less than four weeks of paid time off, including public holidays, compared with 6.6 weeks in the UK—where the law requires a minimum of four weeks off for full-time workers—and 7.9weeks for Italy. One study showed that people employed by the US subsidiary of a London-based bank would have to work there for 10 years just to be entitled to the same vacation time as colleagues in Britain who has just started their jobs.
Even when they do take vacations, overworked Americans find it hard to switch off. One in three find not checking their email and voicemail more stressful than working, according to a study by the Travelocity website, while the traumas of travel take their own toll. "We commonly complain we need a vacation from our vacations," the author Po Bronson wrote recently. "We leave home tired; we come back exhausted "
Christian Schneider, a German-born scholar at the Wharton business school in Philadelphia, argues that there is "a tendency to really relax in Europe, to disengage from work. When an American finally does take those few days of vacation per year they are most likely to be in constant contact with the office. "
Mindful that well-rested workers are more productive than burnt-out ones, the accounting firm PricewaterhouseCoopers has started closing all its US offices completely twice a year, for 10 days over Christmas and about five around Independence Day. "We wanted to create an environment where people could walk away and not worry about missing a meeting, a conference call or 300 emails," Barbara Kraft, a partner at the company, told the New York Times.
Left to themselves, Americans fail to take an average of four days of their vacation entitlement—an annual national total of 574 million unclaimed days.

What did PricewaterhouseCoopers do to make it possible for its employees to really relax in their vacation ______

A. It created an environment for its employees to be disengaged from work.
B. It advised its employees not to worry about missing telephone calls or emails.
C. It set aside for its employees 10 days for Christmas and Independence Day.
D. It left it to its employees themselves to decide on more vacation entitlement.
查看答案