2004年2月17日北美机经 onion 2004

2004年2月17日北美机经
onion 2004-02-18 22:14:32
·AA:
83、The following appeared in the editorial section of a newspaper in the country of West Cambria.
“The practice of officially changing speed limits on the highways — whether by increasing or decreasing them — is a dangerous one. Consider what happened over the past decade whenever neighboring East Cambria changed its speed limits: an average of 3 percent more automobile accidents occurred during the week following the change than had occurred during the week preceding it — even when the speed limit was lowered. This statistic shows that the change in speed limit adversely affected the alertness of drivers.”

AI:
109、Employees should not have full access to their own personnel files. If, for example, employees were allowed to see certain confidential materials, the people supplying that information would not be likely to express their opinions candidly.

Math:

遇到很多2月的机经题。

ps.A couple decide to have four kids after married. Each kid could be a boy or a girl. Whats the possibility of exactly two boys and two girls?

ps.There are 8 men, 10 women and 10 children. Pick up 4 people to form a team, which has to include 1 man, 2 women and 2 child. how many possibility?

ds. The team is An = An-2 + 11, n > 2，is 633 in this team?
1 A1= 39
2 A2 = 43

ds.One store has digital cameras and video cameras for sale. The number of digital sold is twice the number of video camera. Ask: the average price of digital and video during this month?
1. the unit price of digital
2. the unit price of video.

ps.本月销售一种商品，第一天的收入和其余任何一天的收入差不会超过其本身的50%。已知第二天收入为10，问月末一天的收入最不可能的是：
A：3
B：9
C：12
D：20
E：29

ps.一项工作， A 和 B 同时作需要X小时，如果 A 单独作要(5/3)X小时，问 B单独作要多少小时。

ds. How old a doctor live?
1. 如果这个人早当医生10年，他当医生的时间是他生命的2/3。
2。如果这个人晚当医生10年，他当医生的时间是他生命的1/3。

Verbal 做的不理想，就不误导大家，提供两个阅读吧。

关于蒸汽机的，Feb,9机经。
传统观点认为蒸汽机或高效蒸汽机的发明能节省煤，就象高效节能汽车的出现能节省汽油一样；
新观点：但事实上由于蒸汽机的广泛使用却提高了能源的消费，并没有起到节省能源的效果。

还有一篇对一本书的评论，这本书关于美国黑人文化从非洲黑人文化继承也同时变化发展。

　

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