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第三十五篇

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发布时间： 2016-08-25

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1共用题干单选题 3分

Whatdoesthewritersayaboutplantsconcerningsolarener

  • A. Plants are "the real experts in producing solar energy.
  • B. Plants have been used to produce solar energy.
  • C. Plants have been using solar energy for billions of years.
  • D. Plants have been a source of solar energy.
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正确答案： -

本题解析： 暂无解析

2共用题干单选题 3分

Whydosomescientistsstudyhowplantsconvertsunlightca

  • A. Because they want algae to produce sugars and starches.
  • B. Because they want green plants to become a new source of energy.
  • C. Because they want to turn plant sugars to a new form of energy.
  • D. Because they want to make photosynthesis more efficient.
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正确答案： -

本题解析： 暂无解析

3共用题干单选题 3分

Accordingtothefifthparagraphunderwhatconditionsare

  • A. When there is a lot of oxygen in the air.
  • B. When there is no oxygen in the air.
  • C. When photosynthesis is taking place.
  • D. When enough starch is stored.
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正确答案： -

本题解析： 暂无解析

4共用题干单选题 3分

Researchershavemetwithdifficultieswhentryingtomake

  • A. It is not possible to remove sulfate from the environment.
  • B. It is not possible to work in an airfree environment to produce hydrogen.
  • C. It is not easy to make sugars instead of hydrogen.
  • D. It is too slow for algae to produce hydrogen when the sulfate is removed.
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正确答案： -

本题解析： 暂无解析

5共用题干单选题 3分

WhatisNOTtrueofalgae?

  • A. They are easy to grow.
  • B. They can be a very good fuel source.
  • C. They are cheap to eat.
  • D. They can be used in many ways.
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正确答案： -

本题解析： 暂无解析

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