An international team of research
scientists has created a new kind of rice that contains Vitamin A. The
researchers used genetic engineering to create the new rice. Genetic engineering
is the technology of changing the genes of living things. The researchers say
the rice could help millions of people who do not get enough Vitamin A in the
food they eat. The findings were published in Science magazine.
Vitamin A is necessary for the body’s natural defense system against
disease. Vitamin A is needed to help prevent skin and other tissues from drying
out. It also produces a light-sensitive substance in the eyes.
People who do not get enough Vitamin A cannot see well in the dark. They
may develop a condition that dries the eyes. The condition can result in
infections that lead to blindness.<
更多"阅读下面这篇短文,短文后列出7个句子,请根据短文的内容对每个句子做出判"的相关试题:
[单项选择] 阅读下面这篇短文,短文后列出7个句子,请根据短文的内容对每个句子做出判断。
{{B}}How to
Determine a Topic for Research{{/B}} Because you are going to put
a lot of your time and energy into your research project(项目) ,the topic is
especially important. In many instances your instructor may give a
specific(特殊的)topic. I[ this is done, you have little choice, but most
instructors will permit or even welcome a slightly changed focus(中心)in a
topic if it is supported by good thinking. In some of your
classes, the instructor may present a suggested list of several topics from
which you are to make a choice. If this is done, do not simply select the first
idea that attracts your attention. It may be one with which you will soon become
bored, or it may be one on which you would have difficulty finding all the
necessary information. Looking at the t
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