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According to the passage, people started to make glass ______. One of the extraordinary qualities of glass is that it can carry
According to the passage, people started to make glass ______. One of the extraordinary qualities of glass is that it can carry
admin
2009-03-15
58
问题
According to the passage, people started to make glass ______.
One of the extraordinary qualities of glass is that it can carry ______.
选项
A、light signals
B、sound signals
C、electric signals
D、any signals
答案
A
解析
第二段第三行……which are designed to carry light signals.被用来携带光子信号。
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本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
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公共英语二级笔试
公共英语(PETS)
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