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According to the passage, scientists have discovered that influenza viruses ______. What is known about the influenza virus?
According to the passage, scientists have discovered that influenza viruses ______. What is known about the influenza virus?
admin
2009-05-28
60
问题
According to the passage, scientists have discovered that influenza viruses ______.
What is known about the influenza virus?
选项
A、It was first found in a group of very old birds.
B、All the different strains can be found in wild birds.
C、It existed over 100 million years ago.
D、It can survive in many different places.
答案
D
解析
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本试题收录于:
大学英语三级A级题库大学英语三级分类
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大学英语三级A级
大学英语三级
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