单选题The deep-sea listening system makes use of ______.A the sophisticated technology of focusing sounds under waterB the capability of sound to travel at high speedC the unique property of layers of ocean water in transmitting soundD low-frequency sounds t

题目

单选题

The deep-sea listening system makes use of ______.

the sophisticated technology of focusing sounds under water

the capability of sound to travel at high speed

the unique property of layers of ocean water in transmitting sound

low-frequency sounds traveling across different layers of water

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第1题

根据以下材料，回答 40～43 问题。During a television play the sound man must be ready to make every sound as it is needed．Sound effects are of three kinds：real，imitated and recorded．Real sounds are those of doorbells，telephone bells，and other small objects easy to keep in a studio． But the sound man must imitate many sounds． For bacon fryin9，he crumples cellophane paper．A long sheet of metal hanging in a doorway makes thunder·He taps one rubber sink plunger and then another on a table to imitate a horse walking on pavement． For a horse galloping along a gravel road，the sound man can use the two halves of a coconut，pounding each in turn very fast on the table．Recorded sound effects are used for noises he cannot himself produce offstage．He pays records for such sounds as a rooster crowing， a train leaving a station， and a baby crying．The sound man is an important part of any television production．第 40 题 The sound man is important because he________A．is kept busyB．makes fl TV play more lifelikeC．1ets an actor know when to life a telephone receiverD．is always learning new methods

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第2题

The soundings on the chart are based on the depth of water available at ______.A.mean low waterB.mean lower low waterC.mean high waterD.mean high water springs

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第3题

The most serious effect of air trapped in a diesel engine jacket water cooling system is that it ______．A.Causes colloid suspension in the cooling waterB.Reduces the capability of the lubrication systemC.Can form pockets which block the flow of coolant through the systemD.Leads to the scuffing of cylinder walls

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第4题

A vessel not under command sounds the same fog signal as a vessel ______.A.engaged in towingB.constrained by her draftC.under sailD.All of the above

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第5题

After teaching sounds, a teacher makes a test that aims to find out which sounds students are not able to pronounce. This test belongs to__________.A. aptitude test B. proficiency test C. achievement test D. diagnostic test

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第6题

For each blank，choose the best answer from the four choices and write down on the answer sheet. （）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication. （请作答此空）is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols. （）functions with two layers of protocols.It Can connect networks of different speeds and can be adapted to an environment as it expands. （）is the popular LAN developed under the direction of the IEEE 802.5. （）is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.A.ISO B.ANSI C.CCITT D.IEEE

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第7题

For each blank，choose the best answer from the four choices and write down on the answer sheet. （请作答此空）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication. （72）is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols. （73）functions with two layers of protocols.It Can connect networks of different speeds and can be adapted to an environment as it expands. （74）is the popular LAN developed under the direction of the IEEE 802.5. （74）is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.A.The MAC address B.The IP address C.The subnet address D.The virtual address

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大学英语六级

单选题The deep-sea listening system makes use of ______.A the sophisticated technology of focusing sounds under waterB the capability of sound to travel at high speedC the unique property of layers of ocean water in transmitting soundD low-frequency sounds t

题目

更多“单选题The deep-sea listening system makes use of ______.A the sophisticated technology of focusing sounds under waterB the capability of sound to travel at high speedC the unique property of layers of ocean water in transmitting soundD low-frequency sounds t”相关问题

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