A swift current occurring in a narrow passage connecting two large bodies of water，which is produced by the continuously changing difference in height of tide at the two ends of the passage，is called a ______.A.hydraulic currentB.rectilinear currentC.rotary currentD.harmonic current
A swift current occurring in a narrow passage connecting two large bodies of water，which is produced by the continuously changing difference in height of tide at the two ends of the passage，is called a ______.
A.hydraulic current
B.rectilinear current
C.rotary current
D.harmonic current
相关考题：
Find the word in the passage which means “ the movement from one place to another of a large group of animals” and write it down here: __________.
● （75） are designed to manage large bodies of information.(75)A. I/O portsB. PrintersC. Database systemD. Keyboards
Which of the following is NOT TRUE in the passage?A. The two-way radio is like a telephone for Australian farmers.B. Families on large farms could keep in touch with each other by radios.C. The two-way radio is like a newspaper for Australian farmers.D. All the Australians live on dry places, and they use radios in many ways.
are designed to manage large bodies of information．A．I/O portsB．PrintersC．Database systemD．Keyboards
There are two areas off the N coast of France，which remain dangerous because of ______．A.the density of vessel traffic on passage through the straitB.the fact that the passage through the strait is constricted by a series of narrow banks，running NE-SWC.mines lied in the war of 1939-1945D.the strong tidal streams in the strait
All the following is true except that ______．A.in many places a counter current flows in opposition to the main current close to the bankB.current can vary with depth of water and large deep draught ships can experience different current effects at differing parts of the hull tend to turn to the windC.as speed is reduced，the increased proportion of the ship's vector which is attributable to current will set the ship close to obstructionsD.when close to the berth in a head current，there is a danger that flow inshore of the ship becomes restricted and the ship is subject to interactive forces
A ______ is created by a pressure gradient or slope in the water level．A.gradient currentB.density currentC.swift currentD.torrent current
The number and position of hydrants arranged on board shall be such that _______，one of which shall be from a single length of hose，may reach any part of the ship normally accessible to the passengers or crew while the ship is being navigated．A.at least two jets of water which shall be from the same length of hoseB.at least two jets of water emanating from the same hydrantC.at least two jets of water not emanating from the same hydrantD.at least two jets of water not emanating from the same hydrant，one of which shall be from a single length of hose
共用题干第一篇Water Resources on the EarthThe second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.The word"fraction"in the second paragraph means________.A:a large areaB:a very small amountC:an important systemD:a major source of information
共用题干第一篇Water Resources on the EarthThe second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.Liquid water only exists________.A: in the center of the earthB:on the surface of our planetC:in the coastal areas of the earthD:in a very narrow range of temperatures
The following tells us how to reuse the used water.Which is the right order of the passage A.to have the used water filteredB.to put chemicals in itC.to pipe it to the usersD.to pipe the used water to be purified to a factory
A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）A、Two switch ports will be needed on a switch,two Ethernet cables will be needed for theserver each connecting to two different Ethernet cards,and one IP address will be neededB、Two switch ports will be needed on two different switches two Ethernet cables will beneeded for the server each connecting to two different Ethernet cards,and one IP address will be neededC、Two switch ports will be needed on two different switches,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,two different IP addresses will be neededD、One switch port will be needed on one switch,a splitter will be needed to split the connection,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,and two different IP addresses will be needed
A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）A、Two switch ports will be needed on a switch， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.B、Two switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.C、Two switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， two different IP addresses will be needed.D、One switch port will be needed on one switch， a splitter will be needed to split the connection， two ethernet cables will be needed for the server each connecting to two different Ethernet cards， and two different IP addresses will be needed.
单选题All the following is true except that（）.Ain many places a counter current flows in opposition to the main current close to the bankBcurrent can vary with depth of water and large deep draught ships can experience different current effects at differing parts of the hull tend to turn to the windCas speed is reduced，the increased proportion of the ship's vector which is attributable to current will set the ship close to obstructionsDwhen close to the berth in a head current，there is a danger that flow inshore of the ship becomes restricted and the ship is subject to interactive forces
单选题In a closed cooling water system, which of the problems can cause the water pressure to fluctuate?（）AAn open vent in the cooling systemBA fouled sea chestCA restricted water passage in the engineDAir entrained in the cooling water
单选题Your 15-meter tug is underway and crossing a deep and narrow channel. A large container vessel is off your port bow on a steady bearing. Which statement is TRUE concerning this situation? （）.AYou should maintain course and speedBThe container vessel is the stand-on as it is the larger vesselCYou are not to impede the safe passage of the container vessel in the channelDNone of the above
单选题A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）ATwo switch ports will be needed on a switch,two Ethernet cables will be needed for theserver each connecting to two different Ethernet cards,and one IP address will be neededBTwo switch ports will be needed on two different switches two Ethernet cables will beneeded for the server each connecting to two different Ethernet cards,and one IP address will be neededCTwo switch ports will be needed on two different switches,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,two different IP addresses will be neededDOne switch port will be needed on one switch,a splitter will be needed to split the connection,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,and two different IP addresses will be needed
单选题A swift current occurring in a narrow passage connecting two large bodies of water，which is produced by the continuously changing difference in height of tide at the two ends of the passage，is called a（）.Ahydraulic currentBrectilinear currentCrotary currentDharmonic current
单选题A swift current occurring in a narrow passage connecting two large bodies of water which is produced by the continuously changing difference in height of tide at the two ends of the passage is called a(n)（）.Ahydraulic currentBrectilinear currentCrotary currentDharmonic current
单选题During large storms, when waves crash against the beach, large amounts of sand is suspended in the water and may drift with the current.Awaves crash against the beach, large amounts of sand is suspendedBthe beach is crashed against by waves, large amounts of sand are suspendedCthe beach is crashed against by waves suspending large amounts of sandDwaves crash against the beach, large amounts of sand are suspendedEwaves crash against the beach, the suspending of large amounts of sand is
单选题A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）ATwo switch ports will be needed on a switch， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.BTwo switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， and one IP address will be needed.CTwo switch ports will be needed on two different switches， two Ethernet cables will be needed for the server each connecting to two different Ethernet cards， two different IP addresses will be needed.DOne switch port will be needed on one switch， a splitter will be needed to split the connection， two ethernet cables will be needed for the server each connecting to two different Ethernet cards， and two different IP addresses will be needed.
单选题Which of the following best describes the relationship between the two passages?APassage 2 describes a significant. and discovery that contradicts the argument of Passage 1.BPassage 2 offers a theory that supports the main point in Passage 1.CPassage I provides a possible reason for the scientific inquiry presented in Passage 2.DPassage 1 relates an anecdote that explains the popular misconception in Passage 2.EPassage 2 provides a historical context for the discovery described in Passage 1.
单选题To prevent accidents from occurring, special valve chests are used in such cases in which interchangeable blanks and connecting passages are incorporatedThe bold and italic word “which” means （）.AaccidentsBspecial valve chestsCinterchangeable blanksDconnecting passages
单选题Which statement most accurately describes the difference between the two passages?APassage 1 deals less directly with the exportation of chimpanzees than does Passage 2.BPassage 1 is less concerned with the interaction between man and the land than is Passage 2.CPassage I pertains to a species in its indigenous habitat while Passage 2 addresses the same animal in nonnative settings.DPassage I ends with an expression of optimism and Passage 2 does not.EPassage I introduces a species and describes its status worldwide, while Passage 2 limits its discussion of that species to its activities in the Northern Hemisphere.
单选题Which of the following is the main idea of the passage?AMany universities ban or restrict the sale ofbottled water.BMany states ban or restrict the sale ofbottled water.CThe bottled water industry is concerned about its decreasing sales.DMany people are opposed to the bottled water ban.
单选题Which current would you encounter on a direct passage from London，England，to Capetown，South Africa（）.AFalkland CurrentBBrazil CurrentCNorway CurrentDBenguela Current
单选题Which current would you encounter on a direct passage from southern Africa to Argentina，South America（）.ASouth AtlanticBSouth EquatorialCAgulhasDGuinea