In order to withstand tidal currents, juvenile horseshoe crabs frequently burrow in the sand. Such burrowing
discourages barnacles from clinging to their shells. When fully grown, however, the crabs can readily withstand
tidal currents without burrowing, and thus they acquire substantial populations of barnacles. Surprisingly, in
areas where tidal currents are very weak, juvenile horseshoe crabs are found not to have signifi cant barnacle
populations, even though they seldom burrow.
Which of the following, if true, most helps to explain the surprising fi nding?
(A) Tidal currents do not themselves dislodge barnacles from the shells of horseshoe crabs.
(B) Barnacles most readily attach themselves to horseshoe crabs in areas where tidal currents are weakest.
(C) The strength of the tidal currents in a given location varies widely over the course of a day.
(D) A very large barnacle population can signifi cantly decrease the ability of a horseshoe crab to fi nd food.
(E) Until they are fully grown, horseshoe crabs shed their shells and grow new ones several times a year.
打个比方,像上面这种题目,一上来看到这些单词很多不认识,脑子就晕了,逻辑不像阅读,我觉得长篇的东西可以通过上下文等等来猜,所以碰到这种题目一定晕。一战的时候就是丢在逻辑上了,怎么克服这方面的问题呢?
-- by 会员 一眼万年 (2011/9/15 21:31:29)