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京津城际铁路是连接北京与天津的全国第一条城际间高速铁路。列车时速将达350公里，京津两地30分钟直达，大大促进了京津优势互补，推动京津两市加快发展。 1.关于京津城际铁路的说法，正确的是（ ） ①位于我国地势第三级阶梯上，地势起伏小②可减轻京津客运的压力③有先进的科技作保证④造价低 A .①②④ B.①②③ C.①②③④ D.②③④ 2.京津在发展旅游业的过程中，要注意的突出问题是 A.加大旅游服务设施建设 B.加大交通建设 C.积极兴建旅游景点 D.注意旅游的规模要与环境承载量相适应
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【简答题】转向器是转向系统的( )装置,目前在汽车上广泛应用的转向器主要有齿轮齿条式和( )等几种。
【简答题】在数据处理技术发展过程中,数据独立性最高的阶段是________
【单选题】Which one is not the significance of household contract responsibility system?
A.
It has liberated the rural productivity and motivated peasants to work harder.
B.
It helped to separate a large amount of rural labor force from land cultivation.
C.
It helped peasants to change into commodity producers and managers.
D.
It was affected by the foreign large-scaled agricultural production mode.
【简答题】典型的液力变矩器由哪三个元件组成:泵轮、 、导轮
【单选题】Which one is not the significance of household contract responsibility system?
A.
It has liberated the rural productivity and motivated peasants to work harder. liberated the rural productivity and motivated peasants to work harder. It has liberated the rural productivity and motivated peasants to work harder.
B.
It helped to separate a large amount of rural labor force from land cultivation. It helped to separate a large amount of rural labor force from land cultivation.
C.
It helped peasants to change into commodity producers and managers.
D.
It was affected by the foreign large-scaled agricultural production mode It was affected by the foreign large-scaled agricultural production mode.
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