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16.[海水和浮游生物]
说科学家建议在海里加iron,有说有种plankton会吸收2氧化碳好像,iron会帮助这种植物成长,得出结论好像是科学家说plankton会增加,问削弱
会不会选有plankton成长所需要的营养物质是另一种?
考古:二氧化碳
科学家想通过促进海面一种水生植物的生长来应对二氧化碳,因为这些植物可以吸收二氧化碳。方法是往这些海水里头加大量的铁元素好像,科学家觉得这样一定可以促进该植物生长吸收二氧化碳。
Weaken:往海水中加铁元素会影响其他一些对该植物生长有关键作用的物质的存在,进而影响该植物生长/南太平洋的这样植物死后都会沉下海底,分解为二氧化碳,其量和之前吸引的一样-----当时好像有两个答案。。不太确定。。请NN鉴定
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?
(A)Not all of the nitrogen compounds that are sometimes found in relatively high concentrations in the oceans are nutrients for plankton.
(B)Certain areas of the ocean support an abundance of plankton despite having particularly low concentrations of iron.
(C)The release of the iron compounds did not increase the supply of nitrogen compounds in the area.
(D)A few days after the iron compounds were released, ocean currents displaced the iron-rich water from the surface.
(E)The iron compounds released into the area occur naturally in areas of the ocean where plankton thrive.
weaken 选D |
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