削弱题，就帮看一下B就好

bunnyfdu2015

Plankton generally thrive in areas of the ocean with sufficient concentrations of certain nitrogen compounds near the surface, where plankton live. Nevertheless, some areas, though rich in these nitrogen compounds, have few plankton. These areas have particularly low concentrations of iron, and oceanographers hypothesize that this shortage of iron prevents plankton from thriving. However, an experimental release of iron compounds into one such area failed to produce a thriving plankton population, even though local iron concentrations increased immediately.

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

浮游生物在nitrogen充足的地方生长；然而，有的地方虽然nitrogen多，但是浮游生物少

这些地方少铁，假设：少铁，不能生长了

然而，实验把铁放到一个地方，铁增加了，没能增加浮游生物数量，

	Not all of the nitrogen compounds that are sometimes found in relatively high concentrations in the oceans  are nutrients for plankton.
	Certain areas of the ocean support an abundance of plankton despite having particularly low concentrations of iron.
	The release of the iron compounds did not increase the supply of nitrogen compounds in the area.
	A few days after the iron compounds were released, ocean currents displaced the iron-rich water from the surface.
	The iron compounds released into the area occur naturally in areas of the ocean where plankton thrive.

选D，后来挺容易想通的，我当时在做的时候，选的B，一分钟这样子也没想清楚这个洋流和“放了铁 ，为啥浮游生物还没增多”有啥关系。我就觉得题目讲的-铁多了，浮游生物没多，跟B讲的也差不多，就选了。老是后来整理错题的时候才真正懂，下个月考试肯定又要悲剧了T^T

文迪

我看了一下，也选B啊，想不通为什么选D啊

bunnyfdu2015

文迪 发表于 2014-7-1 16:12
我看了一下，也选B啊，想不通为什么选D啊

我后来是这么想的
B--有些地方虽然铁少，但浮游生物多，那也没说到底是个神马原因导致的铁跟浮游生物如此逆天的关系，B就感觉是一个陈述事实，没讲原因
D--铁增加后的几天，洋流冲走了铁的海水，这就解释了为啥都放了铁了，生物还没多，因为需要的铁都被洋流冲走了

文迪

bunnyfdu2015 发表于 2014-7-1 16:16
我后来是这么想的
B--有些地方虽然铁少，但浮游生物多，那也没说到底是个神马原因导致的铁跟浮游生物如此 ...

有道理！谢谢楼主！

supacc

要求是说 argues most strongly against concluding, on the basis of the information above, that the oceanographers' hypothesis is false? 也就是说，哪个选项是反驳那种认为海洋学家是错误的观点。也就是要选一个支持海洋学家的选项。B是反对海洋学家的。

bunnyfdu2015

supacc 发表于 2014-7-3 16:10
要求是说 argues most strongly against concluding, on the basis of the information above, that the oc ...

3Q看来我读句子还是有点问题。。

zangayo

看一下！