求助十一月JJ逻辑67,跪谢！

mqq0717

楼主实在不理解为什么此题选D。 希望大牛能帮忙解释下！

GWD原题

Planktongenerally thrive in areas of the ocean with sufficient concentrations ofcertain nitrogen compounds near the surface, where plankton live.  Nevertheless, some areas, though rich inthese nitrogen compounds, have few plankton. These areas have particularly low concentrations of iron, andoceanographers hypothesize that this shortage of iron prevents plankton fromthriving.  However, an experimentalrelease of iron compounds into one such area failed to produce a thrivingplankton population, even though local iron concentrations increasedimmediately.

Which of thefollowing, if true, argues most strongly against concluding, on the basis ofthe information above, that the oceanographers’ hypothesis is false?

A.   Not all of the nitrogen compounds that aresometimes found in relatively high concentrations in the oceans are nutrientsfor plankton.

B.   Certain areas of the ocean support anabundance of plankton despite having particularly low concentrations of iron.

C.   The release of the iron compounds did notincrease the supply of nitrogen compounds in the area.

D.   A few days after the iron compoundswere released, ocean currents displaced the iron-rich water fromthe surface.

E.    The iron compounds released into the areaoccur naturally in areas of the ocean where plankton thrive.

gzgzgz123

我这个月考的遇到原题了选项位置都没变  答案记住哦

如果洋流带走了释放的铁  这个实验就是有缺失的   那么海洋学家的假设自然就不成立了

carolcs

海洋学家的假设是plankton的生长与iron成正比，题目问的是以下反对结论（这个结论是海洋学家的假设是错的），也就是问，以下哪个是支持海洋学家的
D的意思是海水把iron冲走了，所以没有使plankton生长

mqq0717

谢谢楼上的二位！！