单选题The first paragraph is written to be a (n) ______.AintroductionBwarningCargumentDdiscussion
单选题
The first paragraph is written to be a (n) ______.
A
introduction
B
warning
C
argument
D
discussion
参考解析
解析：
原文第一段指出，一位15岁的学生发明了以人的体温为电源的手电筒。他赢得了一项大奖和继续研发的机会。由此可知本段是关于这项发明的简短介绍。故A项正确。B项“警告”、C项“论点”、D项“讨论”均与原文主题不符。
原文第一段指出，一位15岁的学生发明了以人的体温为电源的手电筒。他赢得了一项大奖和继续研发的机会。由此可知本段是关于这项发明的简短介绍。故A项正确。B项“警告”、C项“论点”、D项“讨论”均与原文主题不符。
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