皮皮学，免费搜题
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搜题
【单选题】
抗原漂移指的是甲型流感病毒的是A.
型特异性抗原小变异
B.
型特异性抗原大变异
C.
亚型抗原的大变异
D.
亚型抗原的小变异
E.
以上都是
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】In the first picture, what is the man going to do?
A.
He is going to Wuhan to save his relative who have contracted the new coronavirus.
B.
He is going to Wuhan to develop the medicine to cure the people who have infected the new coronavirus.
C.
He is going to Wuhan to help the people who have infected the new coronavirus.
D.
He is going to Wuhan to see his relatives and friends who are free from new coronavirus.
【单选题】How many types of differeces are there in the first picture on the PPT.
A.
1
B.
2
C.
3
D.
4