甲型肝炎病毒属于
A.微小DNA病毒科
B.小RNA病毒科
C.黄病毒科
D.微小RNA病毒科
E.嗜肝DNA病毒科
参考答案:B
解析:甲型肝炎病毒为单股正链RNA,属小RNA病毒科。
甲型肝炎病毒属于
A.微小DNA病毒科
B.小RNA病毒科
C.黄病毒科
D.微小RNA病毒科
E.嗜肝DNA病毒科
参考答案:B
解析:甲型肝炎病毒为单股正链RNA,属小RNA病毒科。
阅读理解 | |
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A. I didn't know what to do next. B. I decided to give up. C. I was hurt by my son deeply. D. I was very proud of my son. | |
2. We learn from the passage that the author ________. | |
A. has the gift of seeing with the heart B. likes spring rain because it seldom rains in spring C. had lost her mother before her marriage D. seldom praised her child in the past | |
3. How does the author feel about her family? | |
A. No one listened to her seemingly unimportant things. B. She didn't get along well with her husband and son. C. She seldom spoke to her mother. D. She felt quite alone in her family. | |
4. The passage is mainly about ________. | |
A. how to educate children properly B. the fact that we should see nature differently C. the influence of friendship on our life D. how friendship begins and develops |