推 jimboy:人口增加5%但銷售卻只增加三點多,所以比例就下降了! 09/14 16:48
→ giyoshi:我應該是想太多了 還帶數字驗證~發現不一定 09/14 19:09
推 redeyes:per capita只要consumption/population就好啦 不用想太多 09/14 19:34
這題也是我在pp的時候錯的...(應該不難吧?!但這題我選不出來)
From 1973 to 1976, total United States consumption of cigarettes increased
3.4 percent, and total sales of chewing tobacco rose 18.0 percent.
During the same period, total United States population increased
5.0 percent.
If the statements above are true, which of the following conclusions can
be properly drawn?
A) United States manufacturers of tobacco products had higher profits in
1976 than in 1973.
B) Per capita consumption of cigarettes in the United States was
lower in 1976 than in 1973
C) The proportion of nonsmokers in the United States population dropped
slightly between 1973 and 1976.
D) United States manufacturers of tobacco products realize a lower profit
on cigarettes than on chewing tobacco.
E) A large percentage of United States smokers switched from cigarettes
to chewing tobacco between 1973 and 1976.
正解是B....有人可以跟我說一下為什麼嗎??
感恩
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