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Each year there are at least five million people around the world who develop serious flu ( 流感 ) , and almost half a million deaths.When someone we know gets the flu virus , we expect them to be very careful not to pass it on to others.Doctors and nurses working with flu patients also need to protect themselves from the virus.But what is the best way to do this? This is the question that flu expert Professor Jonathan Van-Tam at Nottingham University is trying to answer.He wants to find out how flu is transmitted , so that he can stop doctors and nurses getting sick. Van-Tam explains their method , “ There are 41 volunteers in my experiment.Some healthy volunteers are made to get flu first.When they show symptoms ( 症状 ) , other volunteers , usually called recipients( 接受者 ) , enter the house.Everyone lives together in the small space for four days.Some of the recipients wear face masks , and wash their hands every 15 minutes , but some have no protection.In this way we can study who catches the flu and which ways of transmitting flu are important.During the four days when they are in contact with the virus , and for the ten days after that , the flu recipients are checked regularly. ” The experiment is not simple and it is very expensive.It is difficult to design correctly , and it is also difficult to plan and carry out.Just one study like this takes about 18 months to organize and needs hundreds of people working on it.But Van-Tam believes it is worth because the results will help to decide what type of protection is needed for people working in hospitals with large numbers of flu patients around the world.And perhaps it could reduce the number of deaths from flu each year.
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【判断题】Pit No. 3 looks like in “凹”shape.
A.
正确
B.
错误
【简答题】企业可使用的激励方法有 、 、 、 和 、 。
【简答题】请大家谈谈水是什么?水与人类的关系 ?并用具体事例加以说明。(字数要求200字以上)
【单选题】组成气动仪表放大环节的元部件是
A.
节流阀和气容
B.
波纹管和气容
C.
膜片和功率放大器
D.
嘴挡板机构和功率放大器
【简答题】一个基本的c程序包括哪几部分
【简答题】男性,73岁,河南林县人,因进行性吞咽困难3个月就诊,目前能进流食。既往吸烟50年,每日1包。平时喜食腌制食品。其弟因食管癌去世。身高1.75m,体重50kg。食管镜检查提示食管中段癌。拟行食管手术入院。分析此病人病史中与食管癌发病相关的因素。此病人术前最主要的问题是什么?主要术前准备有哪些?
【判断题】In a “凹”shape, Pit No. 3 is the smallest of all the pits, with only 68 warriors inside.
A.
正确
B.
错误
【判断题】In a 凹 shape, Pit No. 3 is the smallest of all the pits, with only 68 warriors inside.
A.
正确
B.
错误
【单选题】609多排扣件式钢管模板支架,四周应设通长竖向剪刀撑,中间纵横方向每隔( )应设置一道竖向剪刀撑。
A.
4~5个立杆间距或5~7m
B.
6~8个立杆间距或7~9m
C.
8~10个立杆间距或8~10m
D.
2~4个立杆间距或2~4m
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