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

游客2024-07-09 16

问题 According to the passage, scientists have discovered that influenza viruses ______. [br] New strains of viruses are transmitted to man by ______.

选项 A、A type of wild pig
B、diseased lower animals
C、a group of migrating birds
D、a variety of means

答案 D

解析

转载请注明原文地址:https://tihaiku.com/zcyy/3669902.html

相关试题推荐

随机试题

最新回复(0)

Accordingtoa【B1】________,about25percentofcollegestudentshaveapart-ti