题干

2009年,墨西哥发现首例甲型H1N1流感患者后,在世界多个国家都有发现病例.下列关于甲型H1N1病毒的叙述,错误的是(   )

A:细胞细小,结构简单

B:只能寄生在活的细胞里

C:能使人、禽致病

D:能够利用它研制病原疫苗

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答案(点此获取答案解析)

A

同类题4

Dear Dad,
   Happy birthday to you !
   On this special day I'd like to talk to you1a special way.
   I don't think I am good at2you my thought face to face with you,so I'm writing to show my deep love for you.You're not a rich man or a famous person.But in my heart,you are one of the greatest3 in the world.I am4 you.
   You are5 interested in fame and wealth.You do6 things like paying phone bills on time,and working as a worker in your factory.The smile on your face shows you are pleased with the family.You take good care of my grandparents.You help me with my schoolwork and do some shopping with Mom on Sundays.
   In the past,I didn't care7 you were with me or not.Now I am sorry to say I8 you the respect before.But I am thankful for what you have done for me. I am quite lucky that I have9 a great father.And I feel happy that now I can let you10 how much I love you.You are successful as a son,a husband,a father,and a friend.
   Wish you happy forever!
                                                                                                                                               Yours,

                                                                                                                                               David