听力原文:W: Are you going to the fair next Saturday?
M: What fair?
W: The annual fair that Riverbell puts on the first Saturday in June to raise money for the Riverdale hospital.The fair is being held on the university athletic field just like in previous years. Haven't you noticed the tents that had already been set up?
M: Yes, I have, what are they for?
W: They are for the many special events and displays. And this year there'll be quite a few new events.
M: How about you? Will you go?
W: Yes, actually I am going to help serve food at the refreshment tent for a few hours Saturday afternoon.
M: Do many people volunteer to help out?
W: Oh, yes. I like helping, because I really enjoy seeing a lot of my friends at the food tent. Everybody loves to eat.
M: So that's it. I heard some other people talking about going to hear local bands. Everyone says that this year's show is supposed to be more exciting than all the others put together. That's the entertainment tent, right?
W: Right, but that event will be the evening before the fair on Friday. An auction will take place on Saturday afternoon, and there will be some real treasures for sale then. People donate all kinds of things. There will also be an art show on Saturday and a special games tent just for children.
M: And all the profits from the fair always go to support the hospital. What a good idea! Well, I need a couple of bookcases; maybe I can find some at the auction. I'm glad you mentioned it.
(23)
A.To organize activities for children.
B.To sell local farm products.
C.To bring tourists to the town.
D.To raise fund for the hospital.
第1题
人感染乙脑病毒后,绝大多数表现为隐性感染或轻型感染,只有少数引起中枢神经系统症状,发生脑炎。()
A.正确
B.错误
第3题
A.如果血脑屏障不完善,病毒易侵人中枢神经系统
B.抗原性稳定,灭活疫苗免疫效果好
C.乙脑病毒感染的免疫主要依赖体液免疫中和抗体
D.隐性感染可获得牢固免疫
E.人感染乙脑病毒后,绝大多数表现为隐性感染或轻型感染
第5题
人被带乙脑病毒的蚊叮咬后,大多数表现为哪种感染
A、显性感染
B、隐性感染
C、慢性感染
D、急性感染
E、混合感染
第7题
乙脑的流行病学中正确的是
A.蚊虫感染乙脑病毒后亦可发病
B.人对乙脑不易感,因此感染后仅少数人发病
C.乙脑流行高峰在夏秋季节
D.乙脑多发于青壮年
E.动物非其传染源
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