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单选题
Because the actual center of some planets may differ from the observed center，the navigator applies a correction known as the（）.
A
phase correction
B
refraction correction
C
semidiameter correction
D
augmentation correction
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更多 “单选题Because the actual center of some planets may differ from the observed center，the navigator applies a correction known as the（）.A phase correctionB refraction correctionC semidiameter correctionD augmentation correction” 相关考题
考题
CIn most situations, light helps us see. But nowadays humans are using too much of it so that it is in fact a kind of pollution.When it comes to looking at the night sky, too much light makes it difficult for us to watch some of life’s most wonderful sights: stars, planets and even galaxies(星系).According to scientific research, about 2, 500 stars can be seen by the human eye without using any special equipment(设备). But because of light pollution, you can only see 200 to 300 stars from today’s countryside, and no more than ten stars from a city. In most big cities, people cannot see the sky filled with stars like they did in their childhood.Light pollution affects more than just our view of sky. Research shows that lots of nighttime light can harm wildlife, too.When birds fly to another place over cities, they sometimes get lost by the brightness and fly in circles(圈) until they drop from tiredness. Sea turtles(海龟) need dark beaches for laying eggs, but they can’t find their ideal places because of those bright lights.Too much light at night may even affect human health, but scientists are not sure of that. They are still learning more.In order to prevent things from going worse, governments and some organizations are working to reduce light pollution. Many cities and towns have taken action to reduce the use of lights at night. Lights are used only when and where they are truly needed. They also shine lights down at the ground instead of up into the sky and use lower brightness levels.Hopefully, in the near future, humans can enjoy the clear and beautiful sky again and all the wildlife will live a peaceful and undisturbed life, too.27. Why does the writer think that too much light is a kind of pollution?A. Because there are fewer and fewer stars.B. Because human health has been affected.C. Because too much light is a waste of energy.D. Because some of the wildlife can be harmed.
考题
23．The moon is bright because__________A． there is some fire 'on itB． it is near the sun，tooC． there is big mirror on itD． it can get light from the sun
考题
EFFECTS OF CHILD ABUSE AND NEGLECT Child abuse may leave lasting scars. Some scars are physical, but some emotional scars may affect a child's whole life. The effects of child abuse include Lack of trust. The child needs safety physically and (1). If a child suffers from abuse, he won't feel safe, so it is very difficult for him to learn to trust people. This may lead to difficulties when the child has to (2)good relationship with the others, because he is afraid that someone may control him. Feelings of being “worthless”. If you tell a child over and over again that he is stupid or no good, it is very hard for him to overcome the feelings, and he will accept them. When he grows up, he may not work hard for a (3) life, because he doesn't believe he can make it or he thinks of himself as worthless. Trouble in(4) emotions. If an adult once suffered from abuse in his childhood, he can't express emotions safely. (5), the emotions are coming out in unexpected ways. He may easily get angry, even turn to drugs to numb out the painful feelings.1.A. emotionalB. verbalC. emotionally2.A. keepB. formC. have3.A. betterB. goodC. nice4.A. to controlB. controllingC. control5.A. In additionB. By contrastC. As a result
考题
New research shows that men and women may ( )each other in food choices.A. differ fromB. suffer fromC. vary fromD. learn from
考题
Which two statements are true about the use of the procedures listed in the vsysaux_occupants.move_procedure column?()
A. The procedure may be used for some components to relocate component data to the SYSAUX tablespace from its current tablespace.B. The procedure may be used for some components to relocate component data from the SYSAUX tablespace to another tablespace.C. All the components may be moved into SYSAUX tablespace.D. All the components may be moved from the SYSAUX tablespace.
考题
Although TCP segments differ from UDP segments, they both contain some common fields. What two segments do they share in common?()
A. source addressB. optionsC. sequence numberD. sourcesE. destination portF. checksum
考题
People differ______one another______their ability to handle stress.A．from…toB．from…inC．for…inD．in…from
考题
This may be because some people do not have the genes necessary to generate particular smell receptors in the nose.These receptors are the cells which sense smells and send（ ）to the brain.A.signs
B.stimuli
C.messages
D.impulses
考题
Estimates（ ）anywhere from 600,000 to 3 million.Although the figure may vary,analysts do agree on another matter:that the number of the homeless is increasing,one of the federal government’s studies predicts that the number of the homeless will reach nearly 19 million by the end of this decade.A.cover
B.change
C.range
D.differ
考题
共用题干
Natural MedicinesSince earliest days,humans have used some kinds of medicines.We know this because humans have survived.Ancient treatments for injury and disease were successful enough to keep humans from dying out completely.They were successful long before the time of modern medicine. Before the time of doctors with white coats and shiny（发亮的）instruments. Before the time of big hospitals with strange and wonderful equipment.Many parts of the world still do not have university-educated doctors. Nor do they have expensive hospitals.Yet injuries are treated.And diseases are often cured.How?By ancient methods. By medicines that might seem mysterious , even magical（有魔力的）.Traditional medicines are neither mysterious nor magical,however.Through the centuries , tribal（部落的）medicine men experimented with plants. They found many useful chemicals in the plants.And scientists believe many of these traditional medicines may provide the cure for some of today's most serious diseases.Experts say almost 80% of the people in the world use plants for health care.These natural medicines are used not just because people have no other form of treatment. They are used because people trust them. In developed areas,few people think about the source of the medicines they buy in a store .Yet many widely-used medicines are from ancient sources,especially plants.Some experts say more than 25%of modem medicines come,in one way or another,from nature.Scientists have long known that nature is really a chemical factory. All living things contain chemicals that help them survive .So scientists' interest in traditional medicine is not new.But it has become an urgent concern.This is because the earth's supply of natural medicines may be dropping rapidly. It can be seen from the passage that the earth's supply of natural medicines______.A: may never be exhaustedB: may be dropping rapidlyC: is surprisingly bigD: is as rich as ever
考题
Some people are in favor of the proposition because they think( ) A.it may reduce the number of teenage pregnancies
B.it might protect girls from being raped
C.the current law is not fair to all girls
D.the current law is attacked by many parents
考题
Although TCP segments differ from UDP segments, they both contain some common fields. What two segments do they share in common?（）A、source addressB、optionsC、sequence numberD、sourcesE、destination portF、checksum
考题
翻译：As different computers display color differentlythe color of the actual item may vary slightly from the above images.
考题
From the middle part to the end of the 18th century, in English literature （） flourished. They were mostly stories of mystery and horror which take place in some haunted or dilapidated middle age castles.
考题
单选题What is the definition of transverse metacenter?（）A
The distance between the actual center of gravity and the maximum center of gravity that will still allow a positive stabilityB
The point to which G may rise and still permit the vessel to possess positive stabilityC
The sum of the center of buoyancy and the center of gravityD
The transverse shift of the center of buoyancy as a vessel rolls
考题
单选题Which of the following statements is NOT true?A
People may have different personalities.B
People differ from each other in appearance.C
People can learn to recognize human faces.D
People can describe all human features of others.
考题
单选题Aboard a vessel, multiplying a load’s weight by the distance of the load’s center of gravity from the centerline results in th eload’s（）.A
TCGB
transverse momentC
righting momentD
transverse free surface moment
考题
单选题The rated operating time of a self-contained breathing device may be reduced in actual use because of（）.A
pressure differences in the atmosphereB
the length of the hose attached to the facepieceC
the physical exertion of the person wearing the deviceD
spaces containing poisonous vapors
考题
单选题Some people may disagree with the author on his method because they think _____.A
it is not practical for adultsB
it is already out of dateC
it isn’t a primary methodD
it fails to cultivate creativity
考题
单选题A virtual rise in the center of gravity of a ship may be caused by（）.A
filling a partially filled tankB
using fuel from a pressed fuel tankC
emptying a partially filled tankD
transferring pipe from the setback area to the pipe rack
考题
单选题To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is（）.A
the actual depthB
added to or subtracted from the charted depthC
multiplied by the charted depthD
divided by the charted depth
考题
单选题A virtual rise in the center of gravity may be caused by（）.A
filling a partially filled tankB
using an on board crane to lift a freely swinging heavy objectC
emptying a partially filled tankD
transferring ballast from the forepeak to the after peak
考题
多选题Although TCP segments differ from UDP segments, they both contain some common fields. What two segments do they share in common?（）Asource addressBoptionsCsequence numberDsourcesEdestination portFchecksum
考题
单选题Some experts ______ that driving while talking on a cell phone is dangerous and ______ because it prevents drivers from devoting their full attention to the road.A
rescind, foolhardyB
deny, perilousC
contend, harmlessD
contest, inconvenientE
assert, distracting
考题
单选题A phase correction may be applicable to correct the sextant altitude correction of（）.A
any starB
the SunC
third magnitude stars onlyD
some planets
考题
单选题A virtual rise in the center of gravitty may be caused by（）.A
filling a partially tankB
using an on board crane to life a freely swinging heavy objectC
emptying a partially filled tankD
transferring ballast from the forepeak to the after peak
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