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A diesel engine exposed to widely varying ambient temperatures should use to a lubricating oil with （）
A . a high viscosity index
B . a low viscosity index
C . neutralize acids
D . resist oxidation at high temperature
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The airborne concentrations of substances (such as H2S) under which nearly all workers may be repeatedly exposed without adverse effects are called（）.
A . exposure limits
B . concentration limits
C . threshold limit values
D . substance limit value
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Each part of the fire-main system located on an exposed deck must be（）.
A . protected against freezing
B . locked to prevent theft
C . numbered sequentially
D . pressurized at all time
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A vessel moored with two anchors,sometimes, at an exposed roadstead to（）.
A . aid turing the ship
B . obtain a fine bearing
C . increase ship swing to wind or tide
D . lighten the stress of anchor chai
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A vessel moored with two anchors，sometimes，at an exposed roadstead to（）.
A . aid turning the ship
B . obtain a fine bearing
C . increase ship swings to wind or tide
D . lighten the stress of anchor chai
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A fire hose with a nozzle attached must be connected to each hydrant except when exposed to heavy weather or when the（）.
A . fire hose might be damaged by cargo operations
B . vessel is in port
C . fire-main system is not charged
D . fire pumps are used for purposes other than supplying water to the fire mai
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数据库SQL语言中，"AGEIN（15，35）"短语的正确含义是（）。
A . AGE=15ANDAGE=35
B . AGE=15ORAGE=35
C . AGE<=35ANDAGE>=15
D . AGE<35ANDAGE>15
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You have an existing Windows Communication Foundation (WCF) service that exposes a service contract over HTTP. You need to expose that contract over HTTP and TCP. What should you do?（）
A . Add a net.tcp base address to the host.
B . Add an endpoint configured with a netTcpBinding.
C . Add an endpoint behavior named netTcpBehavior to the existing endpoint.
D . Add a binding configuration to the existing endpoint named netTcpBinding.
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A cutoff valve in the fire-main system of a ship may be closed to protect the portion of the system on an exposed deck from（）.
A . damage from crane operations
B . being used for wash down purposes
C . accidental diversion of flow to wrong location
D . freezing
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If a pilot whose eyes have fully adapted to darkness is exposed to a bright flash of light, the time required for dark adaptation to be re-established is most likely to be （0.5分）
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It is important to be repeatedly exposed to these language points and to practice them daily in order to firmly grasp grammar and vocabulary in a foreign language. .
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(expose)____to sunlight for too much time will do harm to one‘s skin.
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According to Chomsky' s ideas about language acquisition, ______learn language by being exposed to it.
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The sentence were "They were wanted to remain quiet and not to expose themselves." is a______ sentence.
A．simple
B．coordinate
C．compound
D．complex
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Strangely, the more we are exposed to advertising, the less we notice it
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Children in the United States are exposed to many influences______ those of their families.
A．more than
B．other than
C．rather than
D．better than
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Some workers in the nuclear power station were exposed to high levels of________.
A．radiation
B．cancer
C．microwaves
D．high temperature
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During our lives all of us are exposed to the possibility of a variety of risk events such as: work accidents, major illness, death, etc. If our finances are vulnerable to the consequences of a risk event, it would be wise to protect ourselves and our dependents against those consequences. This can be done in a number of ways, from taking steps to ensure that we are not endangered to purchasing insurance that would compensate for the financial consequences of the risk event occurring.
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Potential AIDS victims who refuse to be tested for the disease and then defend their right to remain ignorant about whether they carry the virus are entitled to that right. But ignorance cannot be used to rationalize irresponsibility. Nowhere in their argument is their concern about how such ignorance might endanger public health by exposing others to the virus.
When a disease selectively attacks the socially disadvantaged, such as homosexuals and drug abusers, it seems an injustice beyond rationalization. Such is the case with acquired immune deficiency syndrome.
Some crucial facts: AIDS is a communicable disease. The percentage of those infected with the AIDS virus who will eventually contract the disease is unknown, but that percentage rises with each new estimate. The disease so far has been 100 potential. The latency period between the time the virus is acquired and the disease develops is also unknown.
We now have tests for the presence of the virus that is as efficient and reliable as almost any diagnostic test in medicine. An individual who tests positive can be presumed with near-certainty to carry the virus, whether he has the disease or not.
To state that the test for AIDS is "ambiguous", as a clergyman recently in public, is a misstatement and an immoral act. The test correlates so consistently with the presence of the virus in bacteria cultures as to be considered 100 percent certain by experts.
Everyone who tests positive must understand that he is a potential person for the AIDS virus and has a moral duty and responsibility to prevent others from infection. We are not just dealing with the protection of the innocent but with an essential step lo contain the spread of an epidemic as horrible as any that has befallen modern man.
It may seem unfair to burden the tragic victims with concern for the welfare of others. But moral responsibility is not a luxury of the fortunate, and evil actions committed in despair cannot be condemned out of pity. It is morally wrong for a healthy individual who tests positive for AIDS to be involved with anyone except under the strict precautions now defined as safe sex.
It is morally wrong for someone in a high risk population who refuses to test himself to do other than to assume that he tests positive. It is morally wrong for those who, out of sympathy for the heartbreaking victims of this epidemic, as though well-wishing and platitudes about the ambiguities of the disease are necessary in order to comfort the victims while they contribute to enlarging the number of those victims. Moral responsibility is the burden of the sick as well as the healthy.
As for whether potential AIDS victims carrying the virus, the author suggests that
A．they have the right to. be kept in the dark.
B．they have the right to be protected.
C．ignorance may result in serious consequences.
D．ignorance may bring indifference to the disease.
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按有关原则规定翻译下列短语。to be at the end of one’s rope
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You may be exposed to （）like pedophiles and burglars without being aware of it.
A、hunter
B、haunt
C、predator
D、editor
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Carol, the science teacher in Tennessee, said the kids should not be exposed to the outside world.（）
是
否
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No one in one hundred children exposed to the disease______likely to develop it.
A．is
B．are
C．should be
D．must be
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The hospital may have exposed the patients to the viruses, because
A．they tried to protect their delicate instruments.
B．they didn"t follow the policy accordingly.
C．they didn"t know how to follow the policy sometimes.
D．they have good intentions but the end result is bad.
