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问题 单项选择题

构成招标采购服务项目费用最主要的部分是( )。

A．人力资源费
B．资料费
C．企业管理费
D．专家评审费

答案

参考答案：A

解析： 招标采购服务工作所发生的费用主要有人力资源费、市场调研费、资料费、开标的场租费和专家评审费、办公及设施费、企业管理费与税金等。其中人力资源费及与人力资源相关的费用占据相当大的比例，所以合理地组建招标工作团队及确定适当的组织模式是成本控制的关键。

单项选择题

Motherhood may make women smarter and may help prevent dementia in old age by bathing the brain in protective hormones, US reseachers reported on Thursday.
Tests on rats show that those who raise two or more litters of pups do considerably better in tests of memory and skills than rats who have no babies, and their brains show changes that suggest they may be protected against diseases such as Alzheimer’s. University of Richmond psychology professor Craig Kinsley believes his findings will translate into humans.
"Our research shows that the hormones of pregnancy are protecting the brain, including estrogen, which we know has many neuroprotective effects, " Kinsley said.
"It’s rat data but humans are mammals just like these animals are mammals, " he added in a telephone interview. "They go through pregnancy and hormonal changes. "
Kinsley said he hoped public health officials and researchers will look to see if having had children protects a woman from Alzheimer’s and other forms of age-related brain decline.
"When people think about pregnancy, they think about what happens to babies and the mother from the neck down, " said Kinsley, who presented his findings to the annual meeting of the Society of Neuroscience in Orlando, Florida.
"They do not realize that hormones are washing on the brain. If you look at female animals who have never gone through pregnancy, they act differently toward young. But if she goes through pregnancy, she will sacrifice her life for her infant—that is a great change in her behavior that showed in genetic alterations to the brain. \

Which title is the best for this passage

A. Do You Want to Be Smarter
B. Motherhood Makes Women Smarter
C. Mysterious Hormones
D. An Important Study
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填空题

小明去打开水，水未开，此时观察到温度计示数为77 ℃，电能表示数为；水开时，温度计示数为97 ℃，电能表示数为，电热水器消耗了         J的电能。第二天小明又去打水，发现水仍未开，水的温度为t，等到水开时温度计示数为98 ℃，这段时间内电热水器消耗的电能为2.1 kW·h，则t =        ℃。两天水开时的温度不同，是由于液体的沸点与                                     有关。［c水 = 4.2×103 J/(kg·℃)，电路中只有电热水器，且水的质量相等，不计热损失］
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