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California.Conversely， when large numbers of negative ions are present， then people have a feeling of well-being. Natural conditions that produce these large amounts are near the sea， close to waterfalls or fountains， or in any place where water is sprayed， or forms a spray. This probably accounts for the beneficial effect of a holiday by the sea， or in the mountains with tumbling streams or waterfalls.To increase the supply of negative ions indoors， some scientists recommend the use of ionisers： small portable machines， which generate negative ions. They claim that ionisers not only clean and refresh the air but also improve the health of people sensitive to excess positive ions. Of course， there are the detractors， other scientists， who dismiss such claims and are skeptical about negative/positive ion research. Therefore people can only make up their own minds by observing the effects on themselves， or on others，of a negative rich or poor environment. After all it is debatable whether depending on seismic readings to anticipate earthquakes is more effective than watching the cat.
1.What effect does exceeding positive ionization have on some people?
A.They think they are insane.
B.They feel rather bad-tempered and short-fussed.
C.They become violently sick.
D.They are too tired to do anything.
2.In accordance with the passage， static electricity can be caused
by___.
https://www.360docs.net/doc/d64859870.html,ing home-made electrical goods.
B.wearing clothes made of natural materials.
C.walking on artificial floor coverings.
D.copying TV programs on a computer.
3.A high negative ion count is likely to be found___.
A.near a pound with a water pump.
B.close to a slow-flowing river.
C.high in some barren mountains.
D.by a rotating water sprinkler.
4.What kind of machine can generate negative ions indoors?
A.Ionisers.
B.Air-conditioners.
C.Exhaust-fans
D.Vacuum pumps.
5.Some scientists believe that___.
A.watching animals to anticipate earthquakes is more effective than depending on seismography.
B.the unusual behavior of animals cannot be trusted.
C.neither watching nor using seismographs is reliable.
D.earthquake
答案：BCDAA
二
Which is safer-staying at home， traveling to work on public transport， or working in the office? Surprisingly， each of these carries the same risk， which is very low. However， what about flying compared to working in the chemical industry? Unfortunately， the former is 65 times riskier than the latter! In fact， the accident rate of workers in the chemical industry is less than that of almost any
of human activity， and almost as safe as staying at home.
The trouble with the chemical industry is that when things go wrong they often cause death to those living nearby. It is this which makes chemical accidents so newsworthy. Fortunately， they are extremely rare. The most famous ones happened at Texas City (1947)，Flixborough (1974)， Seveso (1976)， Pemex (1984) and Bhopal (1984)。
Some of these are always in the minds of the people even though the loss of life was small. No one died at Seveso， and only 28 workers at Flixborough. The worst accident of all was Bhopal， where up to 3，000 were killed. The Texas City explosion of fertilizer killed 552. The Pemex fire at a storage plant for natural gas in the suburbs of Mexico City took 542 lives， just a month before the unfortunate event at Bhopal.
Some experts have discussed these accidents and used each accident to illustrate a particular danger. Thus the Texas City explosion was caused by tons of ammonium nitrate(硝酸铵)，which is safe unless stored in great quantity. The Flixborough fireball was the fault of management， which took risks to keep production going during essential repairs. The Seveso accident shows what happens if the local authorities lack knowledge of the danger on their doorstep. When the poisonous gas drifted over the town， local leaders were incapable of taking effective action. The Pemex fire was made worse by an overloaded site in an overcrowded suburb. The fire set off a chain reaction os
exploding storage tanks. Yet， by a miracle， the two largest tanks did not explode. Had these caught fire， then 3，000 strong rescue team and fire fighters would all have died.
1.Which of the following statements is true?
A.Working at the office is safer than staying at home.
B.Traverlling to work on public transport is safer than working at the office.
C.Staying at home is safer than working in the chemical industry.
D.Working in the chemical industry is safer than traveling by air.
2.Chemical accidents are usually important enough to be reported as news because ____.
A.they are very rare
B.they often cause loss of life
C.they always occur in big cities
D.they arouse the interest of all the readers
3.According to passage， the chemical accident that caused by the fault of management happened at ____.
A.Texas city
B.Flixborough
C.Seveso
D.Mexico City
4.From the passage we know that ammonium nitrate is a kind of ____.
A.natural gas， which can easily catch fire
B.fertilizer， which cant be stored in a great quantity
C.poisonous substance， which cant be used in overcrowded areas
D.fuel， which is stored in large tanks
5.From the discussion among some experts we may coclude that ____.
A.to avoid any accidents we should not repair the facilities in chemical industry
B.the local authorities should not be concerned with the production of the chemical industry
C.all these accidents could have been avoided or controlled if effective measure had been taken
D.natural gas stored in very large tanks is always safe
答案：DBABC
三
Most of us are taught to pay attention to what is said—the words. Words do provide us with some information， but meanings are derived from so many other sources that it would hinder our effectiveness as a partner to a relationship to rely too heavily on words alone. Words are used to describe only a small part of the many ideas we associate with any given message. Sometimes we can gain insight into some of those associations if we listen for more than words.
We dont always say what we mean or mean what we say. Sometimes our words dont mean anything except " Im letting off some steam. I dont really want you to pay close attention to what Im saying. Just pay attention to what Im feeling." Mostly we mean several things at once.
A person wanting to purchase a house says to the current owner， "This step has to be fixed before Ill buy." The owner says， " Its been like
that for years." Actually， the step hasnt been like that for years，but the unspoken message is： " I dont want to fix it. We put up with it. Why cant you?" The search for a more expansive view of meaning can be developed of examining a message in terms of who said it， when it occurred， the related conditions or situation， and how it was said. When a message occurs can also reveal associated meaning. Let us assume two couples do exactly the same amount of kissing and arguing. But one couple always kisses after an argument and the other couple always argues after a kiss. The ordering of the behaviors may mean a great deal more than the frequency of the behavior. A friends unusually docile behavior may only be understood by noting that it was preceded by situations that required an abnormal amount of assertiveness. Some responses may be directly linked to a developing pattern of responses and defy logic. For example， a person who says "No!" to a serials of charges like "Youre dumb，" "Youre lazy，" and "Youre dishonest，" may also say "No!" and try to justify his or her response if the next statement is "And youre good looking."
We would do well to listen for how messages are presented. The words，"If sure has been nice to have you over，" can be said with emphasis and excitement or ritualistically. The phrase can be said once or repeated several times. And the meanings we associate with the phrase will change accordingly. Sometimes if we say something infrequently it assumes more importance; sometimes the more we say something the
less importance it assumes.
1.Effective communication is rendered possible between two conversing partners， if ___.
A.they use proper words to carry their ideas.
B.they both speak truly of their own feelings.
C.they try to understand each others ideas beyond words.
D.they are capable of associating meaning with their words.
2."Im letting off some steam" in paragraph 1 means___.
A.Im just calling your attention.
B.Im just kidding.
C.Im just saying the opposite.
D.Im just giving off some sound.
3.The house-owners example shows that he actually means___.
A.the step has been like that for years.
B.he doesnt think it necessary to fix the step.
C.the condition of the step is only a minor fault.
D.the cost involved in the fixing should be shared.
4.Some responses and behaviors may appear very illogical， but are justifiable if___.
A.linked to an abnormal amount of assertiveness.
B.seen as ones habitual pattern of behavior.
C.taken as part of an ordering sequence.
D.expressed to a series of charges.
5.The word "ritualistically" in the last paragraph equals something done___.
A.without true intention.
B.light-heartedly.
C.in a way of ceremony.
D.with less emphasis.
答案：DBABC
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