投资者很难精确地把握增长型行业的购买时机，因为这些行业的股票价格不会明显的随着经济周

NEW YORK- One in five U.S．workers regularly attends after-work drinks with coworkers, where the most common mishaps range from badmouthing another worker to drinking too much, according to a study released on Tuesday．

Most workers attend so-called happy hours to bond with colleagues, although 15 percent go to hear the latest office gossip and 13 percent go because they feel necessary, said the survey conducted for CareerBuilder.com, an online job site．As to what happens when the after-work drinks flow, 16 percent reported bad-mouthing a colleague, 10 percent shared a secret about a colleague and 8 percent said they drank too much and acted unprofessionally．Five percent said they had shared a secret about the company, and 4 percent confessed to singing karaoke．While 21 percent of those who attended said happy hours were good for networking, 85 percent said attending had not helped them get closer to someone higher up or get a better position．An equal number of men and women said they attended happy hours with co-workers, with younger workers aged 25 to 34 most likely and workers over 55 least likely to attend．Overall, 21 percent of workers attend happy hours with co-workers and; of those nearly a quarter go at least once a month.

The survey was conducted online by Harris Interactive on behalf of CareerBuilder.com among 6,987 full-time employees between February 11 and March 13．Harris Interactive said the results had a sampling error of plus or minus 1.2 percentage points.

56．Harris Interactive made the survey to find out ________.

A．how U.S．workers spend their after-work time

B．what U.S．workers do at after-work drinks 

C．the relationships between U.S．workers

D．who are most likely to attend after-work drinks

57．________ of workers who attend after-work drinks speak ill of a colleague.

A．4 percent  B．8 percent  C．16 percent       D．10 percent    

58．According to the passage, most of those surveyed believed attending after-work drinks ________．

A．benefited them a lot B．could provide information

C．only made them relaxed  D．was of no help to them

59．We can learn from the text that _________.

A．workers over 55 don’t like to attend happy hours at all

B．about 75% of workers go more than once a month

C．10.5% of male workers attend happy hours with co-workers

D．about 700 workers surveyed shared a secret about a co-worker

60．After the survey, it can be inferred that_________.

A．all the workers oppose after-work drinks

B．the workers may change their attitudes towards after-work drinks

C．all the workers support after-work drinks

D．all the workers are suggested going to attend after-work drinks

（16分）某同学想通过下图装置（夹持装置已略去）实验，探究SO₂与Na₂O₂反应产物。

Ⅰ．装置D的作用                                                   。

Ⅱ．对C中固体产物提出如下假设：

假设1：只有Na₂SO₃             

假设2：只有Na₂SO₄

假设3：                        。

Ⅲ．（1）假设2成立的反应方程式为                                           。

（2）设计实验方案，进行实验。请在答题卡上写出实验步骤以及预期现象和结论。限选实验试剂：2mol.L^-1HCl、1molL^-1BaCl₂、2molL^-1HNO₃

实验步骤	预期现象和结论
步骤1：分别取少量反应后C中的固体置于A、B试管中。
步骤2：
步骤3：

对强制注射疫苗应适用的收费政策是( )。

A．中间价

B．免费和低价政策

C．平价政策

D．高价政策

白虎加人参汤证的病位在（）。

A.心、肺

B.肺、胃

C.心、胃

D.肺、肾

E.心、肾

最早的小儿推拿专著是（）

A.《小儿推拿秘旨》

B.《小儿科推拿仙术》

C.《小儿按摩经》

D.《幼科百效全书》

E.《幼科发挥》