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病毒既无产能酶系，也无蛋白质和核酸合成酶系，因此只能利用宿主活细胞内现成的代谢系统合成自身的核酸和蛋白质
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植物病毒增殖过程与噬菌体的不同之处在于植物病毒病必须在侵入宿主细胞后才脱去衣壳
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已知与人类健康有关的病毒已经超过300种
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酵母膏配置培养基不能提供微生物生长所需要的维生素
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用白糖配置培养基能满足微生物对一般微量元素的需要
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炼油厂火灾扑救应坚持___等战术措施。
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大型商场火灾扑救应坚持___的战术原则，优先利用建筑内部的消防设施实施火灾扑救。
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—May I listen to the music here, Mr. White?
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3.—Did you have a good time at Lauras birthday party?
— Yes, indeed. Its several years ________ I enjoyed myself so much.
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4. —___________ is the Summer Palace from here?
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7. She ______ very hard since she came to our school.
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8. — Who will send you to the new school, your mom or your dad?
— _______. Ill go there by myself.
A. Both B. Either C. Neither D. None
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9.—Well do what we can ____English well this term．
—It’s high time for you to work hard．
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10. —I’m going to Flower Bookstore. Could you tell me ______?
— Sorry, I don’t know. I’m new here.
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11. How do you like the dishes, Eric?
— Fantastic! Nothing tastes ________.
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12. ______ Lin Feng has to work late, she always wears a smile on her face.
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13.You can save money _______ you buy cheaper things.
A. before B. unless C. if D. until
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14. We will have a _________ holiday after the exam．
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15. —We will build an underground in Xuzhou before 2015．
— Wow, _______! Will it pass our place?
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16. — Emily, here’s a dictionary．I hope it will help you in some way．
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A. almost B. still C. only D. just
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17. —Oh．I’m hungry．Mum, can I have the hamburger on the plate?
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18. —We can invite our teachers to the farewell party next Saturday.
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19.You can ________ ask the old man to move away to any other place because he has lived ________ here for at least sixty years．
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20.—I’m going back to see my grandparents this weekend．
—________．
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21.—Why not take ____ umbrella with the sign “Made in China”? It is useful.
—What _______ good advice it is!
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22. —Do you know the boy________ is sitting next to Peter?
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23. It was dark, ______ I couldnt see what was happening.
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24.—You can use MSN to talk with Vivien on the Internet.
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25. _______ are you going to the School Uniform Exhibition, Amy ?
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( ) 26. Where does the writer of "The little Prince" come from?
A．England． B．France． C．America． D．China．
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( ) 27. What does the prince do after the fox tells him a secret?
A．He cares more about a flower and a sheep．
B．He meets many more strange adults on other planets．
C．He realizes his love for the rose and he goes back to his planet．
D．He discovers interesting things such as a snake, other roses and a fox
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( ) 28. What does "The little Prince" mainly talk about? It' s about _________．
A．the adult world B．the planet B -612
C．a rose and a fox D．the adventure of a young prince
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( ) 29. What is the writer's main purpose（目的）in writing this passage？
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C．To tell the readers what present he got from his father．
D． To let people know how poor he was．
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( ) 30. Why did the father not ask his son not to do this and do that？
A．Because he felt quite confident of his son．
B．Because he was born from a poor family．
C．Because he was a man of few words．
D．Because he didn't want to be much too strict with his son．
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( ) 31. What would someone learn from this passage？
A．How to live by oneself． B．How to stand on one's own feet．
C．What a good father should do． D．What the self-important is like．
