题干

我国首次赴南极考察队,在南极洲南部建立了我国第一个南极科学考察基地──中国南极长城站。南极的最低气温-88.3℃,在那里考察队用的液体温度计是酒精温度计而不用水银温度计,这是因为(  )

A:酒精容易制造,价格低

B:酒精的凝固点比水银的凝固点更低

C:酒精温度计比水银温度计测量准确

D:酒精无毒,水银有毒

上一题 下一题 0.0难度 选择题 更新时间:2017-12-29 01:08:46

答案(点此获取答案解析)

B

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    A Chinese consortium(联盟)led by China Railway Corp will participate in bidding for a high-speed railroad linking Singapore and Malaysia in 2018, marking another step in China's ambitious strategy to export its high-speed railway technologies to Southeast Asia.

    The consortium, consisting of eight companies including CRRC, China Railway Construction Corporation Ltd, China Railway Signal and Communication Co and Export-Import Bank of China, covers the design, construction, telecommunication, financing, operating and maintenance(维护)sectors for the high-speed rail network.

    A joint tender(招标)for the Kuala Lumpur-Singapore high-speed rail project was issued by the Malaysian and Singaporean government-owned utilities(公用事业)—MyHSR Corp and SG HSR,on Dec 20.According to a joint statement released by the two companies, the potential bidder would be responsible for the design, construction, financing, operating and maintenance of rolling stock and railway systems for the double-track line with a designed speed of 350 kilometers per hour.

    The tender is open to all companies, regardless of their location. A tender briefing will be held in Kuala Lumpur on Jan 23, and proposals need to be submitted by June 29. Submissions will be evaluated based on technical merit(优点), commercial robustness, financial sustainability and price. The preferred bidder will be selected by the end of next year. The governments of both countries signed a bilateral(双边的)agreement late in 2016 to begin the project. According to the agreement, the high-speed rail link is expected to become operational by Dec 31, 2026, and will cut travel time between Kuala Lumpur and Singapore to just 90 minutes.

    “The move indicates that China's State-owned enterprises have stopped cruel competition to hurt each other,” said Du Chunbu, a professor of rail transportation at Beijing Jiaotong University. “Instead, they have started to form a consortium to better compete with companies from Japan, South Korea, Germany and Canada by bringing their specialties into play.”