diamond（）

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• As you approach mile 427.6 AHP，you see on the right side a white buoy with orange bands and diamond. This buoy marks（）.

  A . a cable crossing B . a sunken barge C . a submerged discharge pipe D . the end of a wharf

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• You see a vessel carrying a black diamond which indicates a（）.

  A . vessel towing astern B . barge pushed ahead C . vessel towing astern only when the length of her tow exceeds 200 meters D . this signal does not exist in international water

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• DiAmonD是：（）。

  A . 自然元素矿物 B . 可以是水热法合成的 C . 与石墨是类质同像 D . 有六方晶系2H型的多型变体称为六方金刚石

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• By day，you sight a vessel displaying three shapes in a vertical line. The top and bottom shapes are balls，and the middle shape is a diamond. It could be a（）.

  A . vessel trolling B . mineclearing vessel C . trawler D . vessel engaged in replenishment at sea

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• Diamond( ) in Brazilian 1971.

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• India is the world’s largest _________ and _____________ of diamonds while Russia is the largest ___________.

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• Porter ’ s Diamond is made up of all of the following except

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• People usually buy a diamond ring when they get ___________.

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• Diamonds have little _____ value and their price depends almost entirely on their scarcit

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• In _____ ( 回顾 ), I found students seem to prefer the reading materials closely related to current events and culture, such as the Queen’s Diamond Jubilee celebrations.

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• 如下程序段，在划线处填写语句并写出card变量的值。enum { club，diamond，heart，spade } card;card=heart;printf ( “___________ \\n”,card);

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• As of 2014, there are 2 acts who won 6 diamond awards. The two acts are______.

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• A white buoy with an open-faced orange diamond on it indicates （).A.dangerB.vessels are ex

  A white buoy with an open-faced orange diamond on it indicates (). A.danger B.vessels are excluded from the area C.the buoy is a mooring buoy D.operating restrictions are in effect

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• In the sentence "The diamond department was the heart and center of the store", "was"

  In the sentence "The diamond department was the heart and center of the store", "was" is the vehicle.() 此题为判断题(对，错)。

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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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• Do not look down upon his! I am sure he is a diamond in the rough（）

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• In order to help to form. shiny crystals of diamonds the carbon needed______.

  A．to act as a catalyst B．to be in different forms C．to have a pressure chamber D．to be dissolved in a melted metal

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• The synthetic crystal of diamond______.

  A．could not even cut glass B．was made at the temperature of 900℉ C．gave off carbon dioxide when it was under X-rays D．is not like the real diamond in atomic structure

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• 钻石的矿物名称是（），它的英文名字是“Diamond

  A．氧化锆 B．金刚石 C．刚玉 D．氧化硅 此题为多项选择题。

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• The structures of diamond and graphite are shown. Which statement about diamond and graphite is not correct （）

  A．Diamond is used in cutting tools because the strong covalent bonds make it very harD B．Graphite acts a lubricant because of the weak bonds between the layers． C．Graphite conducts electricity because the electrons between the layers are free to move D．Graphite has a low melting point because of the weak bonds between the layers．

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• diamond （）

  A．金刚石；钻石；菱形 B．日记；日记簿

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• It is no use ____ to sell diamonds to the people of a poor country.

  A．to try B．try C．trying D．tried

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• She （)her diamond earrings by wearing her hair in a bun.

  A.flaunt B.flout

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• Diamond and graphite are macromolecules.which statement about diamond and graphite is not correct （）

  A．They are giant structures with high melting points． B．They are non-conductors of electricity． C．They contain only atoms of a non-metal． D．They have covalent bonds between the atoms．

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