The self-contained breathing device should not be used in which situation（）.

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• A self-contained breathing apparatus is used to（）.

  A . make underwater repairs to barges B . determine if the air in a tank is safe for men C . enter areas that may contain dangerous fumes or lack oxygen D . resuacitate an unconscious perso

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• “The student” in the sentence “The student liked the linguistic lecture”, and “The linguistic lecture” in the sentence “The linguistic lecture liked the student.” belong to the same syntactic category.

  A . 正确 B . 错误

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• The bypass valve on a self-contained breathing device should be opened if（）.

  A . you are entering a space containing poisonous vapors B . you are entering a space containing explosive gases C . the regulator of the breathing apparatus malfunctions D . the face piece of the breathing device is too tight

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• （）is used in typical marine pattern self-contained unit.

  A . a water cooled condenser B . a slop tank C . a expansion tank D . a centrifugal pum

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• After putting on a self-contained breathing apparatus，you open the air supply and hear a continuous ringing of a bell. What does this mean? （）

  A . The unit is working properly B . The face mask is not sealed properly C . The air bottle needs to be refilled D . The air supply hose has a leak

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• The outside diameter of the pipe is （） the diameter of the bore of the piston rod, the result being that an annular space formed between the piston rod and the pipe.

  A . less than B . greater than C . equal to D . twice larger tha

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• The rated operating time of a self-contained breathing device may be reduced in actual use because of（）.

  A . pressure differences in the atmosphere B . the length of the hose attached to the facepiece C . the physical exertion of the person wearing the device D . spaces containing poisonous vapor

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• A ship must have a self-contained breathing apparatus to be used as protection from gas leaking from a refrigeration unit. To meet this requirement，you may use（）.

  A . a gas mask certified by the Mine Safety and Health Administration B . the same self-contained breathing apparatus required with the fireman's outfit C . an oxygen breathing apparatus，provided that the device has been inspected within three years D . a portable ventilation system that will provide a complete change of air every three minute

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• Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?（）

  A . Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiation B . Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gas C . Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gas D . This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless ga

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• Which one is not the component of a typical, marine pattern self-contained unit?（）

  A . a centrifugal fan B . a direct expansion cooler C . a hermetic compressor D . a centrifugal pum

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• “The house （） go to the daughter, not the son, according to the will of the father.” declared the judge.

  A . may B . should C . must D . shall

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• 验船师在某杂货船上进行设备安全证书的换新检验，在检查证书文件时发现一份关于该船满足SOLAS第II-2章第19条危险货物运输要求的“符合证明”（Document of compliance）。在随后检查到消防员装备（Fire-fighter’s outfits）和SOLAS第II-2章第19条所要求的两套自给式呼吸器（self-contained breathing apparatuses）时，发现船上一共有三套自给式呼吸器。他随即向船长指出还缺少一套。请问验船师的依据是什么？

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• The function of the bypass valve on the self-contained breathing apparatus is to（）.

  A . control the pressure of the oxygen as it enters the body B . allow the wearer to manually give himself oxygen C . release excess heat which would otherwise cause the bottle to explode D . allow exhaled gases to pass outside the bottle

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• The distance between the surface of the water and the tidal datum is the （）.

  A . range of tide B . height of tide C . charted depth D . actual water depth

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• The difference between the height of the metacenter and the height of the center of gravity is known as the（）.

  A . metacentric height B . height of the righting arm C . fore and aft perpendicular D . height of the center of buoyancy

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• A self-contained literature review not only presents new information, but also summarizes multiple previous studies.

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• DNC is a self-contained NC system for a single machine tool.

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• The sound of the money was the payment for the smell of the soup.

  A．Right. B．Wrong. C．Doesn't say.

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• The nuclear family （） a self-contained, self-satisfying unit composed of father, mother and children.

  A．refers to B．defines C．describes D．devotes to

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• The American Heart Association recommended widely using the self-contained heart.

  A. Right B. Wrong C. Not mentioned

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• The Cowherd chased the Weaver and the celestial troops with the help of the cowhide（）

  是 否

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• The wider the road, the higher the safety factor.（）

  是 否

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• The （） the temperature, the greater the retardation of food degradation

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