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According to the passage,a great variety of influenza strains can appear when______.
A. H and N spikes are produced
B. animal and bird viruses are combined
C. dissimilar types virus recombine
D. two viruses of the same type are contracted
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更多 “ According to the passage,a great variety of influenza strains can appear when______.A. H and N spikes are producedB. animal and bird viruses are combinedC. dissimilar types virus recombineD. two viruses of the same type are contracted ” 相关考题
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大众车系睡眠模式下总线电压:CAN-L为5V,CAN-H为0V。
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