With the goal to “make each home its own power station” and “give energy to the poor”, scientists believe that the new technology could be widely used in developing countries and regions, especially in Italia and rural China.
语篇解读:本文是一篇说明文。文章介绍了美国科学家发现的一种利用人造叶子模仿光合作用并以此发电的方法。科学家希望此方法能够解决发展中国家能源短缺的问题。
29.Which of tile following orders correctly shows how the artificial leaf is used to produce electricity?
a.artificial leaves split water into hydrogen and oxygen
b.the hydrogen and oxygen gases are stored in a fuel cell
c.the artificial leaves are put in water
d.the fuel cell uses hydrogen and oxygen to produce electricity
A.c, a, b, d B.c. b, a, d
C.b, c, a, d D.c, a, d, b
答案:A 细节理解题。根据文章第三段可知,人造叶子发电原理是先把叶子放入水中,之后叶子开始分解水,然后把分解出的氢气和氧气储存于燃料电池,最后发电。故选A项。
30.The purpose of the scientists at MIT in developing the new artificial leaf is to ________.
A.build up more power stations in the world
B.provide cheaper energy for developing countries
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