2. 职称英语
  3. According to the passage, scientists have discovered that influenza viruses ____

According to the passage, scientists have discovered that influenza viruses ____

游客2024-07-09  15
问题 According to the passage, scientists have discovered that influenza viruses ______. [br] 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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