网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
Gradient currents caused indirectly ______．
A.by the wind
B.by the wind or by density differences in adjacent areas
C.Coriolis force
D.by ships sailing in the oceans
参考答案
更多 “ Gradient currents caused indirectly ______．A.by the windB.by the wind or by density differences in adjacent areasC.Coriolis forceD.by ships sailing in the oceans ” 相关考题
考题
Damage caused by lighting，a storm，or a sudden gust of wind may be within the exception of ______.A.act of GodB.the Queen's enemiesC.inherent vice in the goodsD.the negligence of the owner of the goods
考题
A ______ is created by a pressure gradient or slope in the water level．A.gradient currentB.density currentC.swift currentD.torrent current
考题
A frontal thunderstorm is caused by ______.A.pronounced local heatingB.wind being pushed up a mountainC.a warm air mass rising over a cold air massD.an increased lapse rate caused by advection of warm surface air
考题
A wind vane on a moving vessel shows ______.A.dead reckoning wind directionB.true wind directionC.apparent wind directionD.estimated wind direction
考题
An anemometer on a moving vessel measures ______.A.apparent wind speed onlyB.true wind speed and true wind directionC.true wind speed onlyD.apparent wind speed and true wind direction
考题
共用题干
第一篇Renewable Energy SourcesToday petroleum（石油）provides around 40% of the world's energy needs, mostly fuelling automobiles.Coal is still used,mostly in power stations,to cover one-quarter of our energy needs,but it is the least efficient,unhealthiest and most environmentally damaging fossil fuel（矿物燃料）.Natural gas reserves could fill some of the gap from oil,but reserves of that will not last into the 22nd century either. Most experts predict we will exhaust easily accessible reserves within 50 years.Less-polluting renewable energy sources offer a more practical long-term energy solution."Renewable"refers to the fact that these resources are not used faster than they can be replaced.Hydroelectric（水力发电的）power is now the most common form of renewable energy,suDDIvina around 20%of world electricity.China's Three Gorges Dam is the largest ever. At five times the size of the US's Hoover Dam, its 26 turbines（涡轮机）will generate the equivalent energy of 18 coal-fired power stations.It will satisfy 3% of China's entireelectricity demand.In 2003. the first commercial power station to use tidal（潮汐的）currents in the open sea opened in Norway. It is designed like windmill（风车）,but others take the torm ofturbines.As prices fall,wind power has become the fastest growing type of electricity generation一quadrupling（翻两番）worldwide between 1999 and 2005. Modern wind farms consist of turbines that generate electricity.Though it will be more expensive,there is more than enoucih wind to provide the world's entire energy needs.Wind farms come in onshore and offshore forms.They can often end up at spots of natural beauty,and are often unpopular with residents.And turbines are not totally harmless一they can interfere with radar, alter climate and kill sea birds.Scotland is building Europe's largest wind tarm,wnicn will power 200.000 homes.The UK's goal is to generate one-fifth of power from renewable sources,mainly wind,by 2020.But this may cause problems,because wind is unreiiable.Which country took the lead in making use of tidal currents to produce power in 2003?A:The UK. B:China.C:Norway. D:TheUS.
考题
若要改变渐变色的色彩渐变方向可通过下列哪些途径？（）A、在Gradient（渐变）调板中输入角度值B、在Gradient（渐变）调板中调整滑块的位置C、使用在GradientTool（渐变工具）D、在Gradient（渐变）调板中调整菱形的位置
考题
CipherSuite字段中的第一个元素密钥交换模式中，不支持的密钥交换模式是哪个（）A、定的Differ—HellmanB、暂的Differ—HellmanC、名的Differ—HellmanD、期的Differ—Hellman
考题
单选题When evacuating a seaman by helicopter lift，the vessel should be（）.A
stopped with the wind dead aheadB
stopped with the wind on the beamC
underway with the wind 30°on the bowD
underway on a course to provide no apparent wind
考题
单选题Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）A
ImpellerB
CompressorC
After-coolerD
Exhaust differ
考题
单选题A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing，the water of（）.A
high density will be on the left in the Northern HemisphereB
high density will be on the right in the Southern HemisphereC
low density will be on the left in the Northern HemisphereD
low density will be on the left in the Southern Hemisphere
考题
单选题That（）is not caused by shallow water.A
turning ability deterioratesB
virtual mass increasesC
the effect of the propeller transverse thrust on yaw altersD
the ship will turn with its head towards the wind
考题
单选题Generally speaking，a ship steaming across the North Pacific from Japan to Seattle is likely to experience（）.A
adverse currents for practically the entire crossingB
favorable currents for practically the entire crossingC
favorable currents in the summer months and adverse currents in the winter monthsD
variable currents having no significant effect on the total steaming time
考题
单选题A local wind which occurs during the daytime and is caused by the different rates of warming of land and water is a（）.A
foehnB
chinookC
land breezeD
sea breeze
考题
单选题The two most effective generating forces of surface ocean currents are（）.A
temperature and salinity differences in the waterB
wind and density differences in the waterC
water depth and underwater topographyD
rotation of the Earth and continental interference
考题
单选题Environmental loading consists of the forces caused by wind，waves，and（）.A
drillingB
soil reactionsC
temperatureD
current
考题
单选题Air circulation is caused or affected by（）.A
the rotation of the earth on its axisB
convection currents caused by differences in radiant heating between equatorial and polar regionsC
mountain rangesD
All of the above
考题
单选题A wind has caused a difference between drafts starboard and port. This difference is（）.A
listB
heelC
trimD
flotation
考题
单选题An anemometer on a moving vessel measures（）.A
apparent wind speed onlyB
true wind speed and true wind directionC
true wind speed onlyD
apparent wind speed and true wind direction
考题
单选题When you walk in a busy street, you should walk on the side _____.A
where the wind is comingB
where the wind is goingC
where the wind is weakerD
where the wind is stronger
考题
单选题A wind blows round anticlockwise defines（）.A
backing ( of wind )B
beach ( to )C
veering ( of wind )D
maintaining direction of the wind
考题
单选题One of the causes of ocean currents is density differences in the water. This is true because （）.A
in an area of high density the water's surface is lower than in an area of low densityB
surface water flows from an area of high density to one of low densityC
the lesser the density gradient the freer the water is to moveD
it is the density differences that cause the currents to stay in the troughs
考题
单选题Magnets are placed in horizontal trays in the compass binnacle to compensate for the（）.A
induced magnetism in the vessel's horizontal soft ironB
change in the magnetic field when the vessel inclines from verticalC
permanent magnetism of the vesselD
magnetic fields caused by electrical currents in the vicinity
考题
单选题Damage caused by lighting，a storm，or a sudden gust of wind may be within the exception of （）.A
act of GodB
the Queen's enemiesC
inherent vice in the goodsD
the negligence of the owner of the goods
热门标签
最新试卷