OG12第59题求助！

taojeny

59. 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.
OG答案为E。我选了A。
答案A说tide currents不是唯一的原因，还有其他原因存在。可以用来解释为什么even though tide currents are weak,juvenile horseshoe crabs are found not to have signifi cant barnacle
populations.
答案E说 Until they are fully grown，而题目问的却是juvenile horseshoe crabs 。选项与题目无关。

moremildseven

E的意思应该是在他们完全长大之前(年轻时),每年寄居蟹都会几次脱落了他们的壳然后长出一个新的,所以才不会有signifi cant barnacle populations
A的意思是潮水不会自己把寄居蟹里面的B给弄出来 这个选项应该是无关选项 原文说的惊讶的发现是年轻的寄居蟹身上的故事