异头碳（anomeric carbon）

相似题目

• The danger associated with using carbon dioxide in an enclosed space is（）.

  A . frostbite B . skin burns C . asphyxiation D . an explosive reactio

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• 总有机碳（Total Oxygen Carbon，简称TOC）

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• Carbon dioxide的中文含义是（）。

  A . 碳氢化合物 B . 碳氧化合物 C . 一氧化碳 D . 二氧化碳

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• The combustion of larger molecules,（）have multiple carbon-carbon bonds involves a more complex series of reactions.

  A . what B . which C . that D . who

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• 异头物（anomers）

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• 英译中（Translate）：carbon reaction（）

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• 异头物

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• A carbon dioxide fire extinguisher should be recharged（）.

  A . at least annually B . whenever it is below its required weight C . only if the extinguisher has been used D . before every safety inspectio

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• The discharge from a carbon dioxide fire extinguisher should be directed（）.

  A . at the base of the flames B . at the center of the flames C . to the lee side of the flames D . over the tops of the flame

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• 异头碳

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• As compared to carbon dioxide,dry chemical has which advantage?（）.

  A . Cleaner B . Effective C . Greater range D . More cooling effect

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• What is NOT a characteristic of carbon dioxide fire-extinguishing agents?（）

  A . Effective even if ventilation is not shut down B . Will not deteriorate in storage C . Non-corrosive D . Effective on electrical equipment

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• 麦芽糖的糖苷键由2个异头碳相连，没有半缩醛羟基，因此没有还原性。（ ）

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• A rise in carbon dioxide concentration in the blood cause（ ）

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• What is the relationship between carbon dioxide and silicate rocks？

  A．Silicate rocks are largely composed of carbon dioxide. B．Silicate rocks contribute to the creation of carbon dioxide. C．The erosion of silicate rocks reduces carbon-dioxide levels in the atmosphere. D．The formation of silicate rocks removes carbon dioxide from the oceans. 此题为多项选择题。

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• ______ is a transparent crystalline carbon.

  A) Graphite B) Coke C) Diamond D) Charcoal

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• Radiant energy is stored as carbon compounds by______.

  A．plants B．water C．rock D．creatures

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• 写出上题中a~d的各结构的异头物，并注明α或β。

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• Transforming carbon into diamonds in the laboratory is______.

  A．more illogical than turning plain lead or iron into gold B．less logical than turning plain lead or iron into gold C．not so illogical as turning plain lead or iron into gold D．as illogical as turning plain lead or iron into gold

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• 弓头碳滑板水平调整需使用（）

  A．扳手 B．水平仪 C．压力表 D．直尺

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• Boiler steel must have % carbon in it（）

  A．more than 0.35 B．less than 0.35 C．less than 0.035 D．more than 1

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• How many asymmetric carbon atoms are present in （）

  A．1 B．2 C．3 D．4

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• After vulcanization, there are still many carbon－carbon double bonds in the molecular chains of natural rubber.（)

  是 否

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• How many carbon atoms does deoxyribose have？

  A．4 B．5 C．6 D．7 E．8

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