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For decades，farmers and environmentalists in California have been entangled in a______over laws that limit the amount of water diverted from rivers and streams for irrigation。
A.dispute
B.register
C.conflict
D.negotiation
B.register
C.conflict
D.negotiation
参考答案
参考解析
解析：本题考查词义辨析。题目意为“几十年来，加利福尼亚州的农民和环境保护主义者一直纠结于限制从河流和溪流中分流用于灌溉的水量的法律纠纷。”A选项“辩论，纠纷”，B选项“登记，注册”，C选项“冲突，矛盾”，D选项“谈判，转让”。根据句意，应该是双方就该法律有纠纷，a dispute over laws，法律纠纷，选项A正确。
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共用题干
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共用题干
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共用题干
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B.switched
C.shifted
D.diverted
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Scientists have learned that spotted owls start to vanish when barred owls come．Some barred and spotted owls have mated and produced hybrid babies．One spotted owl was killed by a barred owl.
Professor Ned K．Brown of the University of California-Berkeley says,"In some areas of Washington,the barred owls moved into very dense,deep woods．The same kind of woods that arc opened up,or destroyed by logging,that adversely influences the spotted owls."
Ten years have passed since the federal government began protecting the spotted owl．Loggers were forced to limit logging on seven million acres of government land．No one is sure how the arrival of the barred owls will impact laws that protect spotted laws．The barred owls like to live in the deep forests where loggers like to cut down trees．The barred owls will likely keep migrating to the Northwest.
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B.on seven million acres of public land
C.two decades ago
D.to save the barred owls
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A.utilized
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B:downgraded
C:mixed
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单选题The author says that in some hot and dry areas it is advisable to _____.A
build big lakes to store waterB
construct big pumping stationsC
channel water from nearby rivers to croplandD
build small and cheap irrigation systems
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单选题From the passage, we know that _____.A
a few years ago. there was no smog at allB
today people don’t have to talk to each other loudlyC
we can drink water from the polluted rivers and lakesD
people are making rules in order to fight pollution
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单选题In launching a lifeboat，when should the tricing pendants be released?（）.A
Before the boat is lowered from the stowage positionB
As soon as the boat-fall blocks clear the davit headC
After the limit switch is activatedD
After all people have been embarked
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单选题One advantage of the all-purpose nozzle is that it（）.A
can fit any size hoseB
converts a stream of water into a fogC
increases the amount of water reaching the fireD
can spray two streams of water at the same time
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单选题When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.A
to cut down the amount of cooling water neededB
to prevent an excess amount of cooling water from being discharged to the bilgesC
to supply hot water to the evaporator for more economical operationD
None of the above is tree
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单选题Laws recently introduced in some states have .A
reduces the number of punishmentsB
resulted in fewer serious accidentsC
prevented bars from serving drunken customersD
specified the amount drivers can drink
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单选题Which of the following statements is TRUE? ______.A
Credit cards have more advantages than travellers’ cheques.B
Dollar bills are as convenient as credit cards.C
One-cent coins have been withdrawn from circulation.D
You can increase your credit limit as you like.
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单选题If the compressor-discharge temperature is higher than the receiver temperature（）A
increase the amount of cooling water to the condenserB
decrease the amount of cooling water to the condenserC
add more refrigerant to the systemD
remove some of the refrigerant from the system
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问答题Practice 4 The problem of pollution is also of great social concern. Continued population increase, accompanied by a rise in the level of living standards, not only threatens to exhaust American resources but pollutes the environment to such an extent that production in the thickly settled area is impossible without damaging the health of the local residents. Smog, once an urban annoyance, is now recognized as a health risk, and the automobile has been pinpointed as the principal culprit. Heavy industries have been blamed for river, soil, air, noise and visual pollutions. DDT and other chemical remedies have been doing more ecological harm than the good that they may have brought along. Several decades ago, Americans dumped raw sewage into rivers and many industrial plants are now still dumping chemical pollutants into lakes, rivers and oceans. Oceans used to be and are still being considered to be a reserve of seafood. Today, after the oceans have become the home of all pollutants, this use of the oceans is being reduced at an alarming rate. The worst pollution threat is concentrated in and near large cities. There the people-made pollutants increasingly surpass the ability of air and water to dilute (冲淡；稀释) the contaminants (污染物) to safe levels. The natural ecological cycle depends on plants, which absorb some pollutants and release oxygen to the air. But near large cities, natural vegetation becomes scarce, and introduced trees, ornamental shrubs and gardens are far from adequate in absorbing motor vehicle and industrial air pollutants. Finally, some pollutants, most notably atomic waste, may continue to contaminate air, land, and water for thousands of years. Therefore, ecocrisis—ecocatastrophe or ecocide—has been for some time one of the major concerns of not only the ecoactivists and environmentalists, but of many scientists of other fields and the government authorities of many countries as well.
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