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(D) As you move around your home, take a good look at the things you have.It’s likely that your living room will have a television set and a video, and your kitchen will have a washing machine and a microwave oven.Your bedroom drawers will be filled with almost three times as many clothes as you need. You almost certainly own a car and possibly a home computer, holiday abroad at least once a year and eat out at least once a week. Now, perhaps, more than ever before, people are wondering what life is all about, and what it is for.Seeking material success is beginning to trouble large numbers of people around the world.They feel that the long-hour work culture to make more money to buy more things is eating up their lives, leaving them very little time or energy for family or pastimes.Many are turning to other ways of living and downshifting_is one of them. Six percent of workers in Britain took the decision to downshift last year.One couple who downshifted is Daniel and Liz.They used to work in central London.He was a newspaper reporter and she used to work for an international bank.They would go to work by train every day from their large house in the suburbs (郊区), leaving their two children with a nanny(保姆).Most evenings Daniel wouldn’t get home until eight or nine o’clock, and nearly twice a month he would have to fly to New York for meetings.They both earned a large amount of money but began to feel that life was passing them by. Nowadays, they run a farm in the mountains of Wales.“I always wanted to have a farm here,” says Daniel, “and we took almost a year to make the decision to downshift.It’s taken some getting used to, but it’s been worth it.We have to think twice now about spending money on car repairs and we no longer have any holidays.However, I think it’s made us stronger as a family, and the children are a lot happier.” Liz, however, is not quite sure.“I used to enjoy my job, even though it was hard work and long hours.I’m not really a country girl, but I suppose I’m gradually getting used to looking after the animals.One thing I do like, though, is being able to see more of my children.My advice for other people wanting to do the same is not to think about it too much or you might not do it at all.” 68.What do the first two paragraphs tell us? A.People seldom work long hours to make money. B.People hardly buy more things than necessary. C.People are sure everything they own is in the right place. D.People realize more is involved in life than just making money. 69.Daniel agrees that the move to the farm __________. A.was easy to organize               B.has improved family life C.was extremely expensive           D.has been a total success 70.The underlined word 'downshifting' in the second paragraph means ________. A.repairing your car by yourself B.spending money carefully C.moving out to the countryside to live a simpler and better life D.living in a big house in the suburbs and dining out once a week
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【单选题】下列化合物中既易发生取代反应,也可发生加成反应,还能使KMnO 4 酸性溶液退色的是(  )
A.
乙烷
B.
乙醇
C.
丙烯
D.
【简答题】特异性抗原决定簇与抗体结合的位置就在Ig的()区,而Ig的补体结合点则在()?功能区。[每空1分]
【单选题】下列化合物中既易发生取代反应,也可发生加成反应,还能使KMn0 4 酸性溶液褪色的是(  )
A.
乙烷
B.
乙醇
C.
丙烯
D.
【单选题】Michaelis-Menten常数Km是:( )
A.
饱和底物浓度时的速度
B.
是最大速度时的底物浓度
C.
饱和底物浓度50%时的反应速度
D.
50%最大速度时的底物浓度
E.
降低反应速度一半时的底物浓度
【单选题】C19能与哪些Ig的补体结合点结合? A、gG1,IgG2,IgG4,IgM
B.
IgG1,IgG3,IgG4,IgA
C.
IgG1,IgG2,IgA,IgM
D.
IgG1,IgG2,IgG3,IgM
E.
IgGIgA、IgM
【单选题】下列化合物中既易发生取代反应也可发生加成反应,还可使KMnO 4 酸性溶液褪色的是 [     ]
A.
乙烷
B.
乙醇
C.
丙烯
D.
【单选题】下列化合物中既易发生取代反应,也可发生加成反应,还能使酸性KMnO 4 溶液褪色的是
A.
乙烷
B.
乙醇
C.
D.
丙烯
【判断题】在田间试验中安排一个试验处理的小块地段称为试验小区。
A.
正确
B.
错误
【多选题】关于米曼非线性消除动力学的叙述正确的是 ( )
A.
Michaelis-Menten方程式 可以描述所有非线性动力学过程
B.
当血药浓度很高时,消除过程饱和,消除速率趋向恒定
C.
Vm是消除速率的最大值
D.
米曼常数Km是消除速率为 1/2 Vm时的血药浓度值。
【多选题】关于米曼非线性动力学的叙述正确的是 ( )
A.
Michaelis-Menten方程式 可以描述所有非线性动力学过程
B.
当血药浓度很高时,消除过程饱和,消除速率趋向恒定
C.
Vm是消除速率的最大值
D.
米曼常数Km是消除速率为 1/2 Vm时的血药浓度值。
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