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单选题
Which of the following is true about the U.S. Navy underwater listening net-work?
A
It is now partly accessible to civilian scientists.
B
It has been replaced by a more advanced system.
C
It became useless to the military after the cold war.
D
It is indispensable in protecting endangered species.
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解析：
细节题。美国海军水下声控系统部分地应用于民用科学家，故选A项。
细节题。美国海军水下声控系统部分地应用于民用科学家，故选A项。
更多 “单选题Which of the following is true about the U.S. Navy underwater listening net-work?A It is now partly accessible to civilian scientists.B It has been replaced by a more advanced system.C It became useless to the military after the cold war.D It is indispensable in protecting endangered species.” 相关考题
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187. It is hard to track the blue whale, the ocean’s largest creature, which has almost been killed off by commercial whaling and is now listed as an endangered species. Attaching radio devices to it is difficult, and visual sightings are too unreliable to give real insight into its behavior. So biologists were delighted early this year when, with the help of the Navy, they were able to track a particular blue whale for 43 days, monitoring its sounds. This was possible because of the Navy’s formerly top-secret system of underwater listening devices spanning the oceans. Tracking whales is but one example of all exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies. Earth scientists announced at a news conference recently that they had used the system for closely monitoring a deep-sea volcanic eruption for the first time and that they plan similar studies. Other scientists have proposed to use the network for tracking ocean currents and measuring changes in ocean and global temperatures. The speed of sound in water is roughly one mile a second, slower than through land but faster than through air. What is most important, different layers of ocean water can act as channels for sounds, focusing them in the same way a stethoscope (听诊器) does when it carries faint noises from a patient’s chest to a doctor’s ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles. [共5题](1) The passage is chiefly about ________.(A) an effort to protect an endangered marine species(B) the exposure of a US Navy top-secret weapon(C) the civilian use of a military detection system(D) a new way to look into the behavior. of blue whales(2) The underwater listening system was originally designed ________.(A) to monitor deep-sea volcanic eruptions(B) to replace the global radio communications network(C) to study the movement of ocean currents(D) to trace and locate enemy vessels(3) The deep-sea listening system makes use of ________.(A) the unique property of layers of ocean water in transmitting sound(B) the capability of sound to travel at hligh speed(C) low-frequency sounds travelling across different layers of water(D) the sophisticated technology of focusing sounds under water(4) It can be inferred from the passage that ________.(A) blue whales are no longer endangered with the use of the new listening system(B) new radio devices should be developed for tracking the endangered blue whales(C) military technology has great potential in civilian use(D) opinions differ as to whether civilian scientists should be allowed to use military technology(5) Which of the following is true about the US Navy underwater listening network?(A) It has been replaced by a more advanced system.(B) It is now partly accessible to civilian scientists.(C) It became useless to the military after the cold war.(D) It is indispensable in protecting endangered species.
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B.It was built from wood and metal
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D.It was designed by Bill Hutch
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Which of the following is TRUE?A.The more Jack explained, the angrier the couple got
B.Jack wanted to show his feelings through words after his experience
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D.From this experience, Jack learned more about American culture
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A floppy drive is replaced in a computer and now when the computer is turned on the floppy drive light is constantly lit. Which of the following is the MOST likely cause?（）A、The power supply has failed.B、The drive cable is connected backwards.C、The floppy drive has failed.D、The proper drivers have not been loaded.
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单选题Which is NOT true about Sudoku?A
Sudoku wasn’t invented in Japan.B
It was The Times that first printed Sudoku in the newspaper.C
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单选题A floppy drive is replaced in a computer and now when the computer is turned on the floppy drive light is constantly lit. Which of the following is the MOST likely cause?（）A
The power supply has failed.B
The drive cable is connected backwards.C
The floppy drive has failed.D
The proper drivers have not been loaded.
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单选题It can be inferred from the passage that ______.A
new radio devices should be developed for tracking the endangered blue whalesB
blue whales are no longer endangered with the use of the new listening systemC
opinions differ as to whether civilian scientists should be allowed to use military technologyD
military technology has great potential in civilian use
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单选题Which of the following statements is true about Japan?A
It has a very short life-expectancy on average.B
It has the lowest infant mortality rate in the world.C
Young people want to have more children.D
The number of young people fit for work is decreasing.
考题
单选题Which of the following statements is NOT true according to the passage?A
The women having children show a rise in cold infections than those without children.B
People with low income will surely more colds than people with high income.C
Juniors are easier to have colds than seniors.D
It has not been proved scientifically that poor nutrition affects susceptibility to colds.
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单选题Which of the following could BEST be used to recover a failed RAID 1 disk after it has been replaced？（）A
Tape restore utilitiesB
Imaging utilitiesC
Partitioning utilitiesD
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Tape restore utilitiesB
Imaging utilitiesC
Partitioning utilitiesD
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单选题Which of the following is NOT true?A
The mental tedium will not exist in the end.B
Hand-loom weaver is the thing of the past.C
Automation is an out-of-date topic today.D
Physical burden in the factory has already been replaced.
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单选题A user has been having difficulty with their PC. Which of the following is the BEST response atechnician should give when a user asks for the definition of a particular bluescreen message?（）A
“It is a message that informs the technician of what hardware needs to be replaced.”B
“A bluescreen message is just another name for an error.”C
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单选题Which of the following statements concerning frontal movements is TRUE（）.A
The temperature rises after a cold front passesB
The barometric pressure rises when a warm front passesC
A cold front generally passes faster than a warm frontD
A warm front usually has more violent weather associated with it than a cold front
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He represents Antananarivo’s poor urban residents.B
He is not accepted by most countries.C
He was mayor of Antananarivo.D
He has been a famous orator throughout Madagascar.
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单选题Which of the following statements is true about Sony?A
Sony is making a new effort for more technological and marketing innovations.B
Its revenue and profits have improved recently.C
Sony is trying to make friends with Microsoft, another player in this industry.D
Microsoft has been making computer games for the last 20 years.
考题
单选题Which of the following is true about the U.S. Navy underwater listening net-work?A
It is now partly accessible to civilian scientists.B
It has been replaced by a more advanced system.C
It became useless to the military after the cold war.D
It is indispensable in protecting endangered species.
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单选题Which of the following is true about the Japanese economy, according to the passage?A
It will slide into deflation very soon.B
It has been affected by economic recession for almost ten years.C
It has maintained a sustained economic recovery for the past decade.D
It will propose to attract more American businesses to invest in key industries.
考题
单选题The passage is chiefly about ______.A
an effort to protect an endangered marine speciesB
the civilian use of a military detection systemC
the exposure of a U.S. Navy top-secret weaponD
a new way to look into the behavior of blue whales
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单选题Which of the following statements is NOT true? _____A
There are both advantages and disadvantages in using a word professor.B
The British companies care much for the health of the people using word processors.C
The technology in the field of computers has been greatly advanced over the last ten years.D
Using world processors, secretaries can get more time to do more interesting work for their bosses.
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单选题Which of the following commands will repair boot sector blocks after a virus has been removed?（）A
chkdskB
formatC
fixmbrD
sfc
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单选题Which of the following is true?A
Anne was lazy, sad and complained all dayB
The book is mainly about Anne’s school lifeC
Anne loved life though she was in difficult timeD
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