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）
单选题
Which of the following is true about coral reefs?
A
They play a significant role in biodiversity.
B
They account for 25% of the marine life.
C
More than a quarter of marine life feed on them.
D
They are threatened by marine life and could be killed.
参考答案
参考解析
解析：
录音中提到“Coral reefs are extremely important for biodiversity, it provides habitats to over 25% of all marine life.”，意思是：珊瑚礁对生物多样性极度重要，它为超过25%的海洋生物提供栖息地。所以A项正确。另外，根据“coral bleaching is threatening many of the world’s coral reefs”(珊瑚礁白化正在威胁着世界上的许多珊瑚礁)可知，D项错误。
录音中提到“Coral reefs are extremely important for biodiversity, it provides habitats to over 25% of all marine life.”，意思是：珊瑚礁对生物多样性极度重要，它为超过25%的海洋生物提供栖息地。所以A项正确。另外，根据“coral bleaching is threatening many of the world’s coral reefs”(珊瑚礁白化正在威胁着世界上的许多珊瑚礁)可知，D项错误。
更多 “单选题Which of the following is true about coral reefs?A They play a significant role in biodiversity.B They account for 25% of the marine life.C More than a quarter of marine life feed on them.D They are threatened by marine life and could be killed.” 相关考题
考题
Of the following, which one is not a term of Marine Weather Bulletin?______.A.Complex lowB.DepressionC.High pressureD.Ambient pressure
考题
The objectives of the ISM Code are to ensure ①safety at sea②prevention of human injury or loss of life③avoidance of damage to the marine environment and to propertyA.①B.②C.②③D.①②③
考题
Which of the following marine insurance policies is normally purchased by the cargo owner？ ______.A.HullB.CargoC.Protection and IndemnityD.Pollution
考题
Which statement is TRUE of a gasoline spill ________．A.It is visible for a shorter time than a fuel oil spillB.It is not covered by the pollution lawsC.It does little harm to marine lifeD.It will sink more rapidly than crude oil
考题
Heavy fuel oils when spilled are ______.A.more harmful to sea life than lighter oilsB.easier to clean up than lighter refined oilsC.less harmful to sea life than lighter oilsD.not a real threat to marine life
考题
Which of the following is not true about the Maori protest movement?（）A、It is popular with younger urban Maoris.B、It aims to gain recognition for their language,values and culture in national life.C、It demands compensation for their language,values and culture in national life.D、The New Zealand government has never paid any attention to the movement.
考题
The Great Barrier Reef is included on the World Heritage list because（）A、it has the most beautiful seascape in the worldB、it has the greatest number of islands in the worldC、it has the most diverse and complex marine life in the worldD、it has the longest coast in the world
考题
单选题Which of the following is NOT true about the NIF?A
NIF contains the world’s most powerful laser.B
NIF experiments will not get significant results until after 2010.C
NIF is by far the only experimental facility aimed at demonstrating the building blocks of nuclear fusion.D
NIF is at the beginning of its experimental life.
考题
单选题Which of the following marine examples belongs to the open loop control system?（）A
Accommodation heating systemB
Steering gearC
Boiler controlD
Cargo control
考题
单选题Which of the following marine insurance policies is normally purchased by the cargo owner?（）.A
HullB
CargoC
Protection and IndemnityD
Pollution
考题
单选题Which of the following is TRUE about the book?A
It is the first world encyclopedic dictionaryB
It can help deaf people know about the world more easilyC
It took them sixteen years to finish the bookD
It includes medicine and art about the life of deaf people
考题
单选题A ship must report a collision with an aid to navigation maintained by the Coast Guard to which office?（）A
Nearest Oceanographic officeB
The Marine Safety Center at Coast Guard HeadquartersC
National Ocean ServiceD
Nearest Officer in Charge，Marine Inspection
考题
单选题A gas-free certificate would usually be issued by a(n)（）.A
ABS marine surveyorB
certified marine chemistC
port engineerD
Coast Guard marine inspector
考题
单选题A gas-free certificate would usually be issued by a(n)（）.A
CCS marine surveyorB
certified marine chemistC
port engineerD
MSA marine inspector
考题
单选题As defined in the regulations governing marine casualties a “marine employer” may be the（）.A
ownerB
agentC
MasterD
All of the above
考题
单选题The primary topic of the passage is which of the following?A
The origin of bioluminescence in plankton predatorsB
The disadvantages of bioluminescence in microorganismsC
The varieties of marine bioluminescent life formsD
Symbiotic relationships between predators and their preyE
Hypotheses on the causes of bioluminescence in plankton
考题
单选题Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organisms which are capable of metabolising oil compounds except（）.A
bacteriaB
mouldsC
yeastsD
seals
考题
问答题Practice 2 Until recently, scientists knew little about life in the deep sea, nor had they reason to believe that it was being threatened. Now, with the benefit of technology that allows for deeper exploration, researchers have uncovered a remarkable array of species inhabiting the ocean floor at depths of more than 660 feet, or about 200 meters. At the same time, however, technology has also enabled fishermen to reach far deeper than ever before, into areas where bottom trawls can destroy in minutes what has taken nature hundreds and in some cases thousands of years to build. Many of the world's coral species, for example, are found at depths of more than 200 meters. It is also estimated that roughly half of the world's highest seamounts - areas that rise from the ocean floor and are particularly rich in marine life - are also found in the deep ocean. These deep sea ecosystems provide shelter, spawning and breeding areas for fish and other creatures, as well as protection from strong currents and predators. Moreover, they are believed to harbor some of the most extensive reservoirs of life on earth, with estimates ranging from 500,000 to 100 million species inhabiting these largely unexplored and highly fragile ecosystems.
考题
单选题In usual marine applications, bellows joints are designed and fitted to accommodate straight line axial movement only and the associated piping requires adequate anchors and guides to prevent misalignmentAccording to the above sentence, which of the following statements is true?（）A
The marine bellows joints are attached in the accommodation onlyB
The bellows joints should be attached to anchorsC
The associated piping should be thrown into the water like as anchorsD
The connecting piping with the joints should be fixed firmly
考题
单选题The Atlantic coast of Patagonia is increasingly vulnerable. Squid fishing is depleting food stocks vital to marine life.A
essential B
preliminary C
sophisticated D
sheer
考题
单选题Administrations should bear in mind the significance of （） in maintaining safety of life and property at sea and in preventing marine pollution.A
advanced nautical equipmentB
advanced performance main enginesC
emergency equipmentD
communication and language skills
考题
单选题Heavy fuel oils when spilled are（）.A
more harmful to sea life than lighter oilsB
easier to clean up than lighter refined oilsC
less harmful to sea life than lighter oilsD
not a real threat to marine life
考题
单选题The objectives of（）are to ensure safety at sea, prevention of human injury or loss of life, and avoidance of damage to the environment,in particular to the marine environment and to property.A
COLREGB
IMDGC
ISMD
SOLAS
考题
单选题The passage supplies information for answering which of the following questions?A
When did the new protectionism arise?B
Why is the new protectionism so popular in northern European countries?C
Does the American government play a more active role in economic life than the British government?D
Why does the government intervene in economic life?
考题
单选题The passage provides an answer to which of the following questions?A
What is the explanation for the phenomenon of bioluminescence in marine life?B
Does the phenomenon of plankton bioluminescence have any practical applications?C
Why do only certain specimens of marine life exhibit the phenomenon of bioluminescence?D
How does underwater bioluminescence differ from atmospheric bioluminescence?E
What are the steps that take place as an individual microorganism becomes bioluminescent?
热门标签
最新试卷