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【简答题】
For years and years people have been saying that the railways are dead. “We can do without railways”, people say as if motorcars and planes have made the railways unnecessary, We all keep hearing that rains are slow, that they lose money, that they’re dying. But this is far from the truth. In these days of expensive oil, the railways have become highly competitive with motorcars and planes. If you want to carry people or goods from place to place, they are cheaper than planes. And they have much in common with planes. A plane goes in a right line and so does a railway. What is more, it takes you from the heart of a city into the heart of another. It doesn’t leave you as a plane does, miles and miles from the city center. It doesn’t hold you up as a car does, in endless traffic jams. And a single train can carry goods which no plane or motorcar could ever do. Far from being dead, the railways are very much alive. Modern railway lines give you a smooth, untroubled journey. Where else can you eat well, sleep in comfort, feel safe and enjoy the scene while you are traveling at speed at the same time? And we are only at the beginning. For we have just entered the age of super-fast trains( 超速列车 ), trains traveling at 150 miles an hour and more. Soon we will be wondering why we spent so much on motorways we can’t use because we have not enough money to buy the oil and planes we can’t fly in for the reason.
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参考答案:
举一反三
【单选题】下列( )不符合女服务员的站立要领。
A.
双脚呈V字形站立
B.
双膝和脚后跟靠紧
C.
脚尖张开的距离约为20~25cm
D.
脚尖张开的距离约为5cm
【简答题】DNA和RNA的基本结构单位都是核苷酸。核苷酸由 ,戊糖和碱基3部分组成。
【单选题】下列( )不符合女服务员的站立要领
A.
双脚呈V字形立。
B.
双膝和脚后跟靠紧
C.
脚尖张开的距离约为20-25CM
D.
脚尖张开的距离约为5CM
【单选题】锤头型核酶是由 个保守核苷酸和 个螺旋结构域构成的。( )
A.
13,5
B.
13,3
C.
12,3
D.
12,5
【单选题】下列不符合女符合女服务员的站立要领之一()
A.
双脚呈V字形站立
B.
双膝和脚后跟靠紧
C.
脚尖张开的距离约为20-25cm
D.
脚尖张开的距离约为5公分
【简答题】核苷酸是构成______的基本单位,一个核苷酸是由______、______和______结合而成。
【单选题】核苷是由哪两种成分构成?
A.
碱基和戊糖
B.
碱基和磷酸
C.
磷酸和戊糖
D.
以上皆非
【简答题】核苷是由____和____构成。
【单选题】下列关于生产安全事故应急预案的评审和备案说法错误的是( )。
A.
地方各级安全生产监督管理部门应当组织有关专家对本部门编制的应急预案进行审定;必要时可召开听证会,听取社会方面的意见
B.
参加应急预案评审预案的施工单位有利害关系的,应当回避
C.
评审人员与所评审预案的施工单位有利害关系的,应当回避
D.
地方各级安全生产监督管理部门的应急预案,应当报最高级人民政府和安全生产监督管理部门备案
【简答题】DNA和RNA的基本结构单位都是核苷酸。核苷酸由 ,戊糖和碱基3部分组成。
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