咳嗽少痰，痰黏不易咯出，口咽干燥，痰中带血，舌红少津，脉细数等症，常见于A．邪热恋肺

可作为血浆凝血因子参与凝血过程的是（）

A.钙

B.镁

C.磷

D.铁

E.锌

咖啡鞣酸具有较广泛的抗菌作用，其结构简式如图所示，下列叙述不正确的是（　　）

A．咖啡鞣酸与浓溴水既能发生取代反应又能发生加成反应

B．咖啡鞣酸分子中与苯环直接相连的原子都在同一平面上

C．1 mol咖啡鞣酸在碱性条件下水解时，可消耗8 mol NaOH

D．咖啡鞣酸的分子式为C₁₆H₁₈O₉

Multitasking

People who multitask all the time may be the worst at doing two things at once, a new research suggests. The findings, based on performances and self-evaluation by about 275 college students, indicate that many people multitask not out of a desire to increase productivity, but because they are easily distracted (分心) and can’t focus on one activity. And “those people turn out to be the worst at handling different things,” said David Sanbonmatsu, a psychologist at the University of Utah.

Sanbonmatsu and his colleagues gave the students a set of tests and asked them to report how often they multitasked, how good they thought they were at it, and how sensation-seeking (寻求刺激) or imperative (冲动) they were. They then evaluated the participants’ multitasking ability with a tricky mental task that required the students to do simple mathematical calculations while remembering a set of letters.

Not surprisingly, the scientists said, most people thought they were better than average at multitasking, and those who thought they were better at it were more likely to report using a cellphone while driving or viewing multiple kinds of media at once. But those who frequently deal with many things at the same time were found to perform the worst at the actual multitasking test. They also were more likely to admit to sensation-seeking and impulsive behavior, which connects with how easily people get bored and distracted.

“People multitask not because it’s going to lead to greater productivity, but because they’re distractible, and they get sucked into things that are not as important.” Sanbonmatsu said.

Adam Gazzaley, a researcher at the University of California, San Francisco, who was not a member of the research group, said one limitation of the study was that it couldn’t find out whether people who start out less focused   toward multitasking or whether people’s recognizing and understanding abilities change as a result of multitasking.

The findings do suggest, however, why the sensation-seeker who multitask the most may enjoy risky distracted driving. “People who are multitasking are generally less sensitive to risky situations.” said Paul Atchley, another researcher not in the group. “This may partly explain why people go in for these situations even though they’re dangerous.”

小题1: The research led by Sanbonmatsu indicates that people who multitask       .

A．seek high productivity constantly

B．prefer handling different things when getting bored

C．are more focused when doing many things at a time

D．have the poorest results in doing various things at the same time小题2:When Sanbonmatsu and his colleagues conducted their research, they          .

A．assessed the multitasking ability of the students

B．evaluated the academic achievements of the students

C．analyzed the effects of the participants’ tricky mental tasks

D．measured the changes of the students’ understanding ability小题3:According to Sanbonmatsu, people multitask because of their        _.

A．limited power in calculation

B．interests in doing things differently

C．inability to concentrate on one task

D．impulsive desire to try new things小题4: From the last paragraph, we can learn that multitaskers usually____  .

A．drive very skillfully

B．go in for different tasks

C．fail to react quickly to potential dangers

D．refuse to explain the reasons for their behavior

某宗房地产现行的价格为2000元/m²，年净收益为200元/m²，报酬率为10%。现获知该地区将兴建一座大型的现代化火车站，该火车站将在6年后建成投入使用，到那时该地区将达到该城市现有火车站地区的繁华程度。在该城市现有火车站地区，同类房地产的价格为5000元/m²。据此预计新火车站建成投入使用后，新火车站地区该类房地产的价格将达到5000元/m²。

获知兴建火车站后该宗房地产的价格为( )。

A．2983.72元/m²

B．3203.78元/m²

C．3693.42元/m²

D．5000元/m²

城乡家庭消费水平和消费结构比较 (单位：千元)
消费类型	城市家庭		农村家庭
	金额(元)	比例(%)	金额(元)	比例(%)
住房	1865.9	6.6	484.7	2.8
食品	9790.2	34.5	5751.0	33.3
衣着	1957.6	6.9	1171.7	6.8
医疗	2670.9	9.4	2141.6	12.4
交通	1425.0	5.0	1107.0	6.4
通讯	1482.9	5.2	965.8	5.6
教育	3170.5	11.2	2069.2	12.0
文化、娱乐、游泳	717.8	2.5	180.3	1.0
电费、水费等日常开销	1935.3	6.8	926.9	5.4
家用电器、家具	1010.7	3.6	567.3	3.3
日用品	467.7	1.7	313.7	1.8
人情往来	1849.1	6.5	1605.7	9.3
合计	28343.7	100	17285.0	100

一般来说，恩格尔系数可以衡量家庭生活水平状况，但在调查中发现了低收入家庭恩格尔系数比中低和中等收入家庭恩格尔系数较低的特殊情况。调查结果显示，家庭消费率明显偏低。

上述文字资料主要显示( )。

A．食品支出占家庭总消费支出的比例越高，家庭生活水平就越低
B．食品支出占家庭总消费支出的比例越低，家庭生活水平就越高
C．低收入家庭的食品支出数额较低，占消费总支出的比例也较低
D．城市低收入家庭食品支出数额高于中等收入家庭食品支出数额