lsat 2-2-16

allen0018

The advanced technology of ski boots and bindings has brought a dramatic drop in the incidence of injuries that occur on the slopes of ski resorts: from 9 injuries per 1,000 skiers in 1950 to 3 in 1980. As a result, the remainder of ski-related injuries, which includes all injuries occurring on the premises of a ski resort but not on the slopes, rose from 10 percent of all ski-related injuries in 1950 to 25 percent in 1980. The incidence of these injuries, including accidents such as falling down steps, increases with the amount of alcohol consumed per skier.

16.   Which one of the following can be properly inferred from the passage?

(A) As the number of ski injuries that occur on the slopes decreases, the number of injuries that occur on the premises of ski resorts increases.

(B) The amount of alcohol consumed per skier increased between 1950 and 1980.

(C) The technology of ski boots and bindings affects the incidence of each type of ski-related injury.

(D) If the technology of ski boots and bindings continues to advance, the incidence of ski-related injuries will continue to decline.（E）

(E) Injuries that occurred on the slopes of ski resorts made up a smaller percentage of ski-related injuries in 1980 than in 1950.

B 为什么不对那？？？ 我总是犯这样的错误，大家帮忙啊～～～

sunglasses

数学

两类伤害：the incidence of injuries that occur on the slopes of ski resorts和 the remainder

1950年，第一类9起，第二类10%，所以总共10起（其中第一类9期，第二类1期）

1080年，第一类3期，第二类25%，所以总共4起（其中第一类3期，第二类1期）

结论：第二类伤害的数量未变

所以文中结论The incidence of these injuries, including accidents such as falling down steps, increases with the amount of alcohol consumed per skier.是错误的

所以B错误

jieyulike

increases with 表明的是两者有共变的关系，并没有说一定两者都增加，也有可能是两者都减少的。
B是一个迷惑的选项。

yboo

以下是引用sunglasses在2006-5-17 9:12:00的发言：

数学

两类伤害：the incidence of injuries that occur on the slopes of ski resorts和 the remainder

1950年，第一类9起，第二类10%，所以总共10起（其中第一类9期，第二类1期）

1080年，第一类3期，第二类25%，所以总共4起（其中第一类3期，第二类1期）

结论：第二类伤害的数量未变

所以文中结论The incidence of these injuries, including accidents such as falling down steps, increases with the amount of alcohol consumed per skier.是错误的

所以B错误

sorry, disagree here.  total incidences could go either up or down from 1950 to 1980.    9 in per 1000 is just showing percentage, not necessarily actually 1000 incidences. 

i think jieyulike's makes more sense.