垄断竞争厂商的短期均衡的位置只能是它刚好获得正常利润。

下列混合溶液中，各离子浓度的大小顺序正确的是  

A．1mol·L^－1氨水1mL与10mL0.1mol·L^－1盐酸混合：c(Cl^－)>c(NH₄⁺)>c(OH^－)>c(H⁺)

B．10mL0.1mol·L^－1NH₄Cl与5mL0.2mol·L^－1NaOH溶液混合：c(Na⁺)=c(Cl^-)>c(OH^-)>c(H⁺)

C．10mL0.1mol·L^－1CH₃COOH溶液与5mL0.2mol·L^－1NaOH溶液混合：

c(Na⁺)=c(CH₃COO^-)>c(OH^-)>c(H⁺)

D．10mL0.5mol·L^－1CH₃COONa溶液与6mL1mol·L^－1盐酸混合：c(Cl^-)>c(Na⁺)>c(OH^-)>c(H⁺)

一、根据以下资料，回答116~120题。2010年，某省广电实际总收入为145.83亿元，同比增长32.07%。其中，广告收入为67.08亿元，同比增长25.88%；有线网络收入为45.38亿元，同比增长26.35%；其他收入为33.37亿元，同比增长57.3%。2010年，该省广电收入中，省级收入为65.32亿元比上年增加15.5亿元；地市级收入为41.61亿元，比上年增加13.39亿元；县级收入为38.90亿元，比上年增加6.52亿元。2010年该省各市、县广电收入的区域分布如下：东部地区50.06亿元，同比增长32.48%，占市县收入份额的62.18%，该地的市均收入为10.01亿元，上年同期为7.56亿元。中部地区17.78亿元，同比增长40.70%，该地区的市均收入为5.93亿元，上年同期为4.21亿元。西部地区12.67亿元，同比增长80.86%，该地区的市均收入为2.53亿元，上年同期为1.4亿元。截止2010年底，该省有线电视用户数为1885.88万户，比上年末净增161.7万户。其中有线数字电视用户为1007.8万户，比上年末净增277.58万户。

2009年，该省广告收入占广电总收入的比重约为：

A．23%

B．26%

C． 31%

D．48%

下列关于工程分包的说法正确的是（）。

A.施工总承包人可以将建设工程主体结构的施工分包给其他单位

B.工程分包后，总承包人不再对分包的工程承担任何责任

C.施工总承包人可以将承包工程中的专业工程自主分包给分包商

D.分保单位不得将其承包的建设工程再分包给其它单位

判断我们一切工作是非得失的标准是

A．是否有利于发展社会主义社会的生产力
B．是否有利于社会的长治久安
C．是否有利于增强社会主义国家的综合国力
D．是否有利于提高人民的生活水平

Who says your job leaves you no time to hit the gym A detailed new study of U. S. physical activity patterns shows that men who work full-time—whether their jobs are active or sedentary— end up getting more exercise than healthy working-age men without a job.
The new study comes from researchers at the National Institutes of Health (NIH). As part of the National Health and Nutrition Examination Survey in 2003, some 1,800 working-age adults were asked questions about their lifestyle and work habits, and, most importantly, they then agreed to wear an accelerometer—a device to measure their physical activity—over the course of several days.
Those data from the accelerometers provide a rare opportunity to nail down how much activity the typical American actually does.
They show that men or women who work in active jobs do more physical activity on weekdays than men or women working in sedentary jobs: that’s perhaps not surprising, but the NIH researchers suggest that it still matters because of an ongoing shift in the economy toward sedentary work.
The more surprising finding is the one that compares full-time workers to people who don’t work. The study shows that men with full-time jobs do more physical activity than healthy men without jobs. ("Healthy men", in this case, were those men who said their primary reason for being out of work—was something other than health or disability.) In fact, even sedentary full- time workers performed more weekday physical activity overall than the healthy non-workers.
The results looked very different for women. Women in sedentary jobs did less physical activity on weekdays than their healthy non-working peers.
So what drives the gender (性别) difference The study looks at the pattems, and unfortunately can’t provide too much detail about their causes. There could be many possible answers, including, perhaps, different abilities to pay for leisure time activities or different attitudes about work and physical activity. It could also be that more non-working women than men are choosing to be at home running around full-time after the kids.
But the NHK researchers do find evidence, they write, to suggest that, whatever causes the difference, healthy non-working women "are replacing work with active pursuits whereas" —for some reason— "non-working men generally are not. \

What is the function of the accelerometers in the study

A. They record people’s physical activities.
B. They measure people’s workload.
C. They distinguish gender differences.
D. They push people to be more active.