问题
单项选择题
下述哪项是正确的（）。
A.HCV是DNA病毒
B.HCV为双链RNA病毒
C.HCV核昔酸序列变异性大
D.HCV只有一个基因型
E.HCV可以分为日本株与美国株，但同源性高达95%以上
答案
参考答案：C
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下述哪项是正确的（）。
A.HCV是DNA病毒
B.HCV为双链RNA病毒
C.HCV核昔酸序列变异性大
D.HCV只有一个基因型
E.HCV可以分为日本株与美国株，但同源性高达95%以上
参考答案：C
| 完形填空。 | |||
| Hi, boys and girls! I’m Kathy. Let me __1 _you something about my family. There 2 three people in my family------my father, my mother, and I. My father is a 3 . And he works in a bank. He thinks his job is 4 boring. He wants _5 a policeman. He enjoys __6__ TV after dinner. My mother is a teacher. She __7_ in a middle school. She thinks her job is very 8 . She likes her students very much. She works hard and often comes back home late. Look, many students are on the playground. Some are walking, __9__are playing games.. In her free time(空闲时间), she likes writing stories 10 a magazine. I grow up. | |||
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