【GMAT考满分阅读RC题库】Solar ponds are bodies of water in which circulati_真题_答案

PREP07 Test 2 - 阅读RC - 14

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Solar ponds are bodies of water in which circulation is incomplete and there is a very high salt concentration that increases with depth. This vertical change in salinity serves to trap heat because concentrated brine in the lowest water level acts as a collector and storage area for solar heat, while the less saline, lighter water at the upper levels provides insulation. Heat is thus retained in the depths.

An artificial pond of this type has been constructed on the western shore of the Dead Sea in Israel in order to test its suitability as a source of low-grade heat for conversion into electricity. An immediate threat to the success of the venture was the growth of algae. Water in solar ponds must be kept maximally transparent to allow penetration of light to the deep storage area. Therefore, any particles of matter in the water, such as algae cells, that scatter or absorb light will interfere with the collection of heat.

One proposed method of controlling the algae was the application of an algicide. However, the Dead Sea is a closed body of water without any outlet and as such is very easily contaminated. Extensive use of chemicals in numerous future full-scale solar ponds would lead to such contamination of the Dead Sea, which now enjoys a lucrative tourist trade.

A recent experiment has supplied a more promising method for controlling the algae. To repress the algae cells' capacity for accommodating themselves to environmental changes, the water in the solar pond was first made more saline through evaporation and then diluted by a rapid inflow of fresh water. This shock reduced the cells' ability to regulate the movement of water through their membranes. They rapidly absorbed water, resulting in distortions of shape, increase in volume, and impairment to motility. Their buoyancy adversely affected, the cells sank to the bottom of the pond, where they encountered the hot waters of the storage layer and were destroyed. This method allows for effective control of nuisance algae while leaving solar ponds as one of the cleanest technologies providing energy for human use.

According to the passage, the growth of algae was considered a threat to the success of the artificial pond near the Dead Sea because the algae

A prevent accurate measurement of the heat collected in the pond
B prevent light from penetrating to the lowest levels of the pond
C enable heat to escape through the upper level of the pond
D restrict the circulation of water within the pond
E produce excess oxygen that lowers the water temperature in the pond

显示答案

正确答案: B

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王滴滴

文中只说了deep area，选项说lowest有些许不妥吧？

2018-02-27 17:20:11 IP属地：天津举报

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Waker 回复王滴滴

是lowest level“s”

2018-02-28 18:38:22 IP属地：湖北举报

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Corla

看到第二句最后有个heat就开心地选了E……

2015-07-17 16:40:00 IP属地：局域网举报

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amandy33

居然选了prevent measurement 脑抽

2017-07-06 16:16:21 IP属地：湖北举报

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buddlla

题目里 b d 内容搞反了吧。。。。

2017-10-14 19:46:20 IP属地：四川举报

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Anne51

solar ponds是盐田，我以为是太阳风暴什么的，一直当天文文章看，怎么看都看不懂，尼玛了

2019-06-03 21:49:01 IP属地：北京举报

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asdfgvbnm

文章中的是collection，和选项中的measurement还是不一样啊，所以它只是影响收集热量。

2019-08-26 12:45:32 IP属地：北京举报

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西門

A. excess oxygen (x) 文章未提
B. restrict the circulation of water (x) 文章未提
C. enable heat to escape (x) 文章未提
D. prevent light from penetrating (o)
E. prevent accurate measurement (x)

2019-12-26 22:17:12 IP属地：局域网举报

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正确率： 84%

难度：

选择材料题号

PREP07 Test 2

GWD
PREP07 Test 1
PREP07 Test 2
PREP2012
OG16
OG17
PREP08 Test 1
PREP08 Test 2
Manhattan
Magoosh
OG18
OG18-数学分册
OG18-语文分册
OG19
OG19-语文分册
OG19-数学分册
OG20
OG20-语文分册
OG20-数学分册

SET 1

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题目来源1:PREP07 Test 2

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