In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）...

第1题

[单选题] At 0400 your vessel is dead in the water and in heavy fog. Your loran set fixes your position at LAT 41°12.1’N，LONG 72°43.5’W. Bottom samples are taken and indicate a composition of soft mud and shell. Your fathometer reads 40 feet. If the vessel draws 9 feet of water，which of the following is TRUE?（）

A、The bottom samples and fathometer reading prove the loran fix is reliable B、The bottom samples and fathometer readings indicate that the loran fix is unreliable C、The information collected indicates that the fathometer may be in error D、The information collected indicates that the chart is most likely in error

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第2题

[单选题] Which arrangement of shell plating is used most in modern shipbuilding（）.

A、Clinker B、Flush C、In-and-Out D、Joggled

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第3题

[] In modern linguistic studies, the written form of language is given more emphasis than the spoken form for a number of reasons.

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第4题

[单选题] I should like to rent a house，modern，comfortable and（）in a quiet neighborhood.

A、all in all B、after all C、above all D、over all

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第5题

[] （）is not used in modern radar.

A、A.EBL B、B.VRM C、C.CRT D、D.Grease pencil

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第6题

[单选题] My parents are not interested in modern music. They are（）the times.

A、before B、behind C、after D、low

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第7题

[单选题] The convenience of modern freeways, railways and airplanes makes travel in America as easy as （）

A、pie B、bread C、soup D、wine

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第8题

[单选题] “This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density（）, drives the compressor directly（）

A、a modern diesel engine；a turbine wheel B、a modem diesel engine；exhaust gases C、a compressor；an exhaust gas turbocharger D、a compressor；a turbine wheel

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第9题

[单选题] In some modern large diesel engines, which of the following is used as the support for the main bearings?（）

A、Bedplate B、Block C、Base D、Sump

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In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.

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