Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
We may all like to consider ourselves free spirits. But a study of the traces left by 50,000 cellphone users over three months has conclusively proved that the truth is otherwise.
"We are all in one way or another boring," says Alhert-László Barabási at the Center for Complex Network Research at Northeastern University in Boston, who co-wrote the study. "Spontaneous individuals are largely absent from the population."
Barabási and colleagues used three months' worth of data from a cellphone network to track the cellphone towers each person's phone connected to each hour of the day, revealing their approximate location. They conclude that regardless of whether a person typically remains close to home or roams far and wide, their movements are theoretically predictable as much as 93 per cent of the time.
Surprisingly, the cellphone data showed that individuals'movements were more or less as predictable at week ends as on weekdays, suggesting that routine is rooted in human nature rather than being an effect of work patterns.
The cellphone records were processed to identify the most visited locations for each user. Then the probability of finding a given user at his or her most visited locations at each hour through the day was calculated.
People were to be found in their most visited location for any given hour 70 per cent of the time. Not surprisingly, the figure increased at night, and decreased at lunchtime and in the early evening, when most people were returning home from work.
The team analysed the randomness(随意的) of people's traces to show it was theoretically possible to predict the average person's whereabouts as much as 93 per cent of the time.
"Say your routine movement is from home to the coffee shop to work: if you are at home and then go to the coffee shop it's easy for me to predict that you are going to work," says co-author Nicholas Blumm.
This predictability was not much affected by differences in age, gender, language spoken or whether a person lived in a rural or urban setting.
The "spontaneous individuals" are most probably people who______.
A.rely much on a cellphone in life
B.can live without a cellphone
C.act without much restraint
D.are boring in some way
第1题
硫氰酸盐试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属检查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
第2题
硫氰酸盐试液用于
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属检查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
第3题
硫氰酸盐试液用于
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属俭查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
第4题
硫代乙酰胺试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中重金属检查
D.磺胺嘧啶中重金属检查
E.铁盐检查
第5题
硫代乙酰胺试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属检查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
第6题
氯化钡试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中重金属检查
D.磺胺嘧啶中重金属检查
E.铁盐检查
第7题
硝酸银试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中重金属检查
D.磺胺嘧啶中重金属检查
E.铁盐检查
第8题
硫化钠试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中重金属检查
D.磺胺嘧啶中重金属检查
E.铁盐检查
第9题
硫化钠试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属检查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
第10题
氯化钡试液
A.氯化物检查
B.硫酸盐检查
C.葡萄糖中的重金属检查
D.磺胺嘧啶中的重金属检查
E.铁盐检查
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