问一道GMAT数学和CRIn 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 curr

问一道GMAT数学和CRIn 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 curr
问一道GMAT数学和CR
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 significant barnacle populations,even though they seldom burrow.Which of the following,if true,most helps to explain the surprising finding?
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 significantly decrease the ability of a horseshoe crab to find food.
E.Until they are fully grown,horseshoe crabs shed their shells and grow new ones several times a year.
OA是E,想不通为什么.
数学题见下图.
补充一个GWD的SC
In 1713,Alexander Pope began ｛his translation of the Illiad,a work that,taking him seven years until completion,and that literary critic Samuel Johnson,Pope’s contemporary,pronounced｝ the greatest translation in any language.
B.his translation of the Illiad,a work that took him seven years to complete and that literary critic Samuel Johnson,Pope’s contemporary,pronounced
D.translating the Illiad,a work that took seven years until completion and that literary critic Samuel Johnson,Pope’s contemporary,pronounced it as
OA是B,我觉得D也没什么问题啊,OA说it指代不清,可是我觉得pronounced it as当中的it明显指代上文所说的work啊,怎么会指代不清呢?
PS：看了2L的回答that ...SJ,...,pronounced as
其实就是SJ,...,pronounced that as
that省略可以,可以B选项连as都省略了,pronounced the greatest translation in any language.感觉怪怪的.

问一道GMAT数学和CRIn 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 curr
1.幼年crab怕被冲走,要burrow,所以壳上barnacles少
成年crab不怕被冲走,不要burrow,所以壳上barnacles多
问,为什么当幼年crab不要burrow的时候,壳上的barnacles还是少?
答,在长成成年crab之前,他们的壳每年都要换（换言之,没发积攒啊!）
补充题：
D中的it是多余的!
that ... SJ,..., pronounced as
其实就是SJ,..., pronounced that as
that指代Illiad
D等于多了个宾语,错