ChaseDream
搜索
返回列表 发新帖
查看: 2909|回复: 3

CR求助In its search for new technologies for solar energy

[复制链接]
发表于 2019-8-21 21:20:06 | 显示全部楼层 |阅读模式
In its search for new technologies for solar energy that can produce lower­-cost electricity, Smith-Diatom is developing a new way to make dye­-sensitive solar cells, in which photons strike light-sensitive dyes. The process uses diatoms, which are unicellular algae that have silicon shells with a complex structure. First, the organic material is removed, and then the shells are coated with a titanium dioxide film that acts as a semiconductor. The diatoms' structure results in more photon activity and thus more efficient production of electricity than with current dye­-sensitized solar cells, which in turn lowers the cost.

Which of the following considerations would, if true, most strongly support the hypothesis that the plan, if implemented, will produce low-cost electricity from dye-sensitive solar cells?

  • ADiatoms are an important link in oceanic food chains and help cycle carbon dioxide from the atmosphere. 分析该选项
  • BThe current cost of electricity produced by dye-sensitive solar cells is roughly three times that of non-solar electricity.分析该选项
  • CBecause diatoms occur naturally, no special engineering processes are needed to produce the basic dye-sensitive solar cell structures. 分析该选项
  • DDye-sensitive solar cells work somewhat more efficiently in lower light than previous solar cell technologies. 分析该选项
  • EThe production of dye-sensitive solar cells primarily uses materials that do not harm the environment. 分析该选项
  • 求问这道题为什么不选E啊,不是 more efficient production of electricity可以减少花费么

发表于 2019-9-18 17:32:23 | 显示全部楼层
楼主没有理解语义

这篇文章是在说一项新科技的作用:cost-low,efficiency-high。为什么能有这个high&low,是因为在导体的材料有了新方法。

A-科技与环境,无关段落主题,直接排除
B-对比成本,无关主题,直接排除
E-又是与环境关系,无关段落

正确项目在C/D之间
C-no engineering process,原文已经说了要先remove再coated,错误
D-弱环境下仍然能够有强吸光性,证明原文逻辑The diatoms' structure results in more photon activity and thus more efficient production
发表于 2019-11-16 22:05:20 | 显示全部楼层
wkkxin 发表于 2019-9-18 17:32
楼主没有理解语义

这篇文章是在说一项新科技的作用:cost-low,efficiency-high。为什么能有这个high&low ...

你讲错了吧,这题不是选C嘛?D选项需要多一步推理,说明lower light这个情况是可以low cost的。C是强调diatoms获取的无成本性,它并非在反驳文章的事实。
发表于 2020-3-11 00:44:49 | 显示全部楼层
正确答案为C。
排除法可以先去掉ABE, 这三个选项明显与原文无关,特别是不要过度推理E。剩下CD,D的答案错在不能擅自把原文中light-sensitive dyes推理为work somehow efficiently in lower light.原文中没有解释或定义光敏感的表现和condition。
而正确答案C中提到了structure的重要性,符合原文中是diatom’s structure results in more ..and thus more efficient production of electricity.
您需要登录后才可以回帖 登录 | 立即注册

Mark一下! 看一下! 顶楼主! 感谢分享! 快速回复:

手机版|ChaseDream|GMT+8, 2024-3-29 06:45
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号

ChaseDream 论坛

© 2003-2023 ChaseDream.com. All Rights Reserved.

返回顶部