单选题Freshwater fish stocks are vulnerable or endangered because of ______.Ashortage of freshwater.Bpollution and changes in their living environment.Cfertilizer run-off.Dclosed chemical works.
单选题
Freshwater fish stocks are vulnerable or endangered because of ______.
A
shortage of freshwater.
B
pollution and changes in their living environment.
C
fertilizer run-off.
D
closed chemical works.
参考解析
解析：
从录音最后提到的超过五分之一的淡水鱼已经变得“vulnerable or endangered because of pollution or habitat modification”，可见污染和生存环境的变化是淡水鱼变得易受伤害或濒临灭绝的原因。
【录音原文】
Sheer shortages of freshwater are not the only problem. Fertilizer run-off and chemical pollution threaten both water quality and public health. More than one fifth of freshwater fish stocks are already vulnerable or endangered because of pollution or habitat modification.
从录音最后提到的超过五分之一的淡水鱼已经变得“vulnerable or endangered because of pollution or habitat modification”，可见污染和生存环境的变化是淡水鱼变得易受伤害或濒临灭绝的原因。
【录音原文】
Sheer shortages of freshwater are not the only problem. Fertilizer run-off and chemical pollution threaten both water quality and public health. More than one fifth of freshwater fish stocks are already vulnerable or endangered because of pollution or habitat modification.
相关考题：
The underlined words “the evicted fish” in Paragraph 3 refer to .A. the fish beaten up B. the fish found outC. the fish fattened up D. the fish driven away
Text 3When prehistoric man arrived in new parts of the world, something strange happened to the large animals. They suddenly became extinct. Smaller species survived. The large, slow-growing animals were easy game, and were quickly hunted to extinction. Now something similar could be happening in the oceans.That the seas are being overfished has been known for years. What researchers such as Ransom Myers and Boris Worm have shown is just how fast things are changing. They have looked at half a century of data from fisheries around the world. Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time. According to their latest paper published in Nature, the biomass of large predators (animals that kill and eat other animals) in a new fishery is reduced on average by 80% within 15 years of the start of exploitation. In some long-fished areas, it has halved again since then.Dr. Worm acknowledges that the figures are conservative. One reason for this is that fishing technology has improved. Today’s vessels can find their prey using satellites and sonar, which were not available 50 years ago. That means a higher proportion of what is in the sea is being caught, so the real difference between present and past is likely to be worse than the one recorded by changes in catch sizes. In the early days, too, longlines would have been more saturated with fish. Some individuals would therefore not have been caught, since no baited hooks would have been available to trap them, leading to an underestimate of fish stocks in the past. Furthermore, in the early days of longline fishing, a lot of fish were lost to sharks after they had been hooked. That is no longer a problem, because there are fewer sharks around now.Dr. Myers and Dr. Worm argue that their work gives a correct baseline, which future management efforts must take into account. They believe the data support an idea current among marine biologists, that of the “shifting baseline.” The notion is that people have failed to detect the massive changes which have happened in the ocean because they have been looking back only a relatively short time into the past. That matters because theory suggests that the maximum sustainable yield that can be cropped from a fishery comes when the biomass of a target species is about 50% of its original levels. Most fisheries are well below that, which is a bad way to do business.31. The extinction of large prehistoric animals is noted to suggest that ________.[A] large animal were vulnerable to the changing environment[B] small species survived as large animals disappeared[C] large sea animals may face the same threat today[D] slow-growing fish outlive fast-growing ones
What are the right reasons to explain why not the guests enjoy the meal? A、because they don't have what they actually wantB、no beautiful young ladies showed upC、steamed fish with all the little bones left inD、too many children making noises
Because of the recent fire in the factory, all the stocks were destroyed. (), we cannot make shipment as arranged before.A、In the caseB、In this casesC、In this eventD、At this event
The systems of universities are very vulnerable because they are decentralized and accessible to many people.
Investment TipsBy Scott RussellInvesting in stocks that are less than $5 per share is a good way to boost your stock portfolio. Many big investors ignore these stocks because of the potential risks involved, however, these stocks often grow significantly over the course of time. Investing in inexpensive stocks is a wise move, provided that you hold on to them for at least one year to allow enough time for them to develop.Four stocks that I suggest for less than $5 per share are High Standard Pharmaceuticals Company, Nova Oil, Inc., Direct Access Publishing Group, and Peak Media Holdings. If you are new to the market, you might want to try investing in them through an online brokerage firm that does not charge a high commission for their services, and remember: only invest up to five percent of your entire stock portfolio in any stock, including these.------------------------------------------------------------------------------------------------------------------------------Quick Stock Quotes -- Thursday April 22 -- 2:40 P.M.(Quotes delayed by 20 minutes)Nova Oil, Inc. (NOI)3.93 +0.08 +2.08%Previous Close 3.85Open 3.87High 3.94Low 3.79Volume 864,300Bid 3.91Bid Size 600Ask 3.97Ask Size 3,30052 Week range 1.64-8.90What type of stocks is the article about?A. Oil company stocksB. Inexpensive stocksC. Pharmaceutical stocksD. Stocks from new companies
资料：There's a good chance that spicy crunchy tuna roll you ordered for lunch doesn't actually contain any tuna at all.That's because 74% of fish sold at sushi venues in the US is mislabeled and often completely different than what's on the menu, according to a 2013 survey from the ocean conservation group Oceana.But new technology could help make the seafood business a bit more transparent. Google is teaming up with Oceana and the aerial and satellite imaging nonprofit SkyTruth to launch Global Fishing Watch this fall, the New York Times reports. The initiative will track and analyze fishing boat practices using satellite technology and, ideally, help ensure that fewer fake or mislabeled fish are swapped in along the way.Seafood providers are also investing in technology to reduce fraud. Boston seafood distributor Red's Best, for example, has increased transparency by selling fish with labels that buyers can scan with their smartphones to access a web page that provides details about the individual fish, including where the fish came from, the New York Times reports.Even if a restaurant serves some real, correctly labeled fish, 95% of the 118 sushi restaurants surveyed by Oceana in cities including New York, Chicago, and Los Angeles had at least one faked sushi item on the menu.Currently, the biggest culprits for fake sushi are snapper （92% misleadingly labeled） and tuna （71%）. White tuna is often swapped for escolar, which is sometimes called the "Ex-Lax Fish, " according to Inside Edition, because it can cause intestinal problems.Roughly 75% of fish labeled snapper isn't even from the snapper family. Because of the predominance of fraud in the supply chain, New York sushi restaurant Sushi Nakazawa refuses to serve red snapper because the risk of fake fish is too high.According to the passage, we can infer that______.A.Sushi restaurants verified by Oceana provide no fake fish.B.it would be better not to eat sushi in America.C.the new technology can help deal with the fake sushi to some extentD.fake or mislabeled fish will no longer exist in the sushi market.
资料：There's a good chance that spicy crunchy tuna roll you ordered for lunch doesn't actually contain any tuna at all.That's because 74% of fish sold at sushi venues in the US is mislabeled and often completely different than what's on the menu, according to a 2013 survey from the ocean conservation group Oceana.But new technology could help make the seafood business a bit more transparent. Google is teaming up with Oceana and the aerial and satellite imaging nonprofit SkyTruth to launch Global Fishing Watch this fall, the New York Times reports. The initiative will track and analyze fishing boat practices using satellite technology and, ideally, help ensure that fewer fake or mislabeled fish are swapped in along the way.Seafood providers are also investing in technology to reduce fraud. Boston seafood distributor Red's Best, for example, has increased transparency by selling fish with labels that buyers can scan with their smartphones to access a web page that provides details about the individual fish, including where the fish came from, the New York Times reports.Even if a restaurant serves some real, correctly labeled fish, 95% of the 118 sushi restaurants surveyed by Oceana in cities including New York, Chicago, and Los Angeles had at least one faked sushi item on the menu.Currently, the biggest culprits for fake sushi are snapper （92% misleadingly labeled） and tuna （71%）. White tuna is often swapped for escolar, which is sometimes called the "Ex-Lax Fish, " according to Inside Edition, because it can cause intestinal problems.Roughly 75% of fish labeled snapper isn't even from the snapper family. Because of the predominance of fraud in the supply chain, New York sushi restaurant Sushi Nakazawa refuses to serve red snapper because the risk of fake fish is too high.What can we infer from this passage?（ ）A.Many sushi restaurants refuse to serve some fish because of the risk of fake fish.B.People have access to track the origins of fish sold in sushi shops.C.Most fish sold in sushi stores is mislabeled but new tech can help to fix the problem.D.Citizens in the US no longer trust the fish sold in sushi venues.
资料：There's a good chance that spicy crunchy tuna roll you ordered for lunch doesn't actually contain any tuna at all.That's because 74% of fish sold at sushi venues in the US is mislabeled and often completely different than what's on the menu, according to a 2013 survey from the ocean conservation group Oceana.But new technology could help make the seafood business a bit more transparent. Google is teaming up with Oceana and the aerial and satellite imaging nonprofit SkyTruth to launch Global Fishing Watch this fall, the New York Times reports. The initiative will track and analyze fishing boat practices using satellite technology and, ideally, help ensure that fewer fake or mislabeled fish are swapped in along the way.Seafood providers are also investing in technology to reduce fraud. Boston seafood distributor Red's Best, for example, has increased transparency by selling fish with labels that buyers can scan with their smartphones to access a web page that provides details about the individual fish, including where the fish came from, the New York Times reports.Even if a restaurant serves some real, correctly labeled fish, 95% of the 118 sushi restaurants surveyed by Oceana in cities including New York, Chicago, and Los Angeles had at least one faked sushi item on the menu.Currently, the biggest culprits for fake sushi are snapper （92% misleadingly labeled） and tuna （71%）. White tuna is often swapped for escolar, which is sometimes called the "Ex-Lax Fish, " according to Inside Edition, because it can cause intestinal problems.Roughly 75% of fish labeled snapper isn't even from the snapper family. Because of the predominance of fraud in the supply chain, New York sushi restaurant Sushi Nakazawa refuses to serve red snapper because the risk of fake fish is too high.Why some sushi restaurants don't serve snapper? （ ）A.Because the risk of fake fish is too high.B.Because not every restaurant can afford snapper.C.Because consumers don't like snapper sushi.D.Because snapper is rare.
资料：There's a good chance that spicy crunchy tuna roll you ordered for lunch doesn't actually contain any tuna at all.That's because 74% of fish sold at sushi venues in the US is mislabeled and often completely different than what's on the menu, according to a 2013 survey from the ocean conservation group Oceana.But new technology could help make the seafood business a bit more transparent. Google is teaming up with Oceana and the aerial and satellite imaging nonprofit SkyTruth to launch Global Fishing Watch this fall, the New York Times reports. The initiative will track and analyze fishing boat practices using satellite technology and, ideally, help ensure that fewer fake or mislabeled fish are swapped in along the way.Seafood providers are also investing in technology to reduce fraud. Boston seafood distributor Red's Best, for example, has increased transparency by selling fish with labels that buyers can scan with their smartphones to access a web page that provides details about the individual fish, including where the fish came from, the New York Times reports.Even if a restaurant serves some real, correctly labeled fish, 95% of the 118 sushi restaurants surveyed by Oceana in cities including New York, Chicago, and Los Angeles had at least one faked sushi item on the menu.Currently, the biggest culprits for fake sushi are snapper （92% misleadingly labeled） and tuna （71%）. White tuna is often swapped for escolar, which is sometimes called the "Ex-Lax Fish, " according to Inside Edition, because it can cause intestinal problems.Roughly 75% of fish labeled snapper isn't even from the snapper family. Because of the predominance of fraud in the supply chain, New York sushi restaurant Sushi Nakazawa refuses to serve red snapper because the risk of fake fish is too high.Why does the author mention Boston seafood distributor Red's Best?（ ）A.To emphasize the importance of seafood providers' responsibilitiesB.To show that the problem of fake or mislabeled fish has already been solvedC.To introduce a new technology of scanningD.To illustrate that seafood providers also take actions to reduce fraud.
This kind of fish are on the verge of extinction,because so many are being killed for their fins.A:drying up B:dying outC:being exportedD:being transplanted
This rare bird has become（）Aan endangered specieBendangered speciesCendangering speciesDan endangered species
This rare bird has become（）A、an endangered specieB、endangered speciesC、endangering speciesD、an endangered species
英国和美国的财务报告中表示存货的术语分别是（）。A、stocks，inventoriesB、inventories，stocksC、stocks，turnoverD、assets，inventories
单选题The passage is focused on _____.Ahow the scientists tried to protect endangered speciesBhow the symbolic endangered species has been chosenCthe relation between global warming and endangered speciesDthe problems in and the future of endangered species protection
单选题Freshwater fish stocks are vulnerable or endangered because of ______.Ashortage of freshwater.Bpollution and changes in their living environment.Cfertilizer run-off.Dclosed chemical works.
单选题According to the passage, frogs are vulnerable in backyards because they are ______.Aharmed by the toxins used to eliminate insect lifeBexposed to moving logs that disrupt their feedingCendangered by the predators of slugs and snailsDthreatened by careless motorists ignorant of frog migration patternsEdenied dark places to produce defense mechanisms
单选题This rare bird has become（）Aan endangered specieBendangered speciesCendangering speciesDan endangered species
单选题Which of the following is less vulnerable to threats and attacks because it is not associated with one specific operating system？（）ACisco Voice and Video over VPNBCisco Secure Access Control ServerCCisco NAC ApplianceDCisco Threats Response
填空题In warm and mild regions, farmed fish and shellfish are also affected by POPs because they are fed fish meal.____
单选题The Atlantic coast of Patagonia is increasingly vulnerable. Squid fishing is depleting food stocks vital to marine life.Aessential Bpreliminary Csophisticated Dsheer
单选题In context, which version of the underlined part of sentence 3 (reproduced below) is the best?Baby lobsters are preyed on by fish and crabs because they don't have a hard shell yet and can't defend themselves with fierce claws yet.Athe lobsters still lack both hard shells and fierce claws with which to fend off predatorBthe lobsters cannot attack their fish and crab predators with fierce claws or fend their predators off with a hard shellCthey don't have a hard shell yet and can't defend themselves with fierce claws yetDthe lobsters don't have a hard shell and can't yet defend themselves with fierce clawsEthe fish and crabs do not have hard shells or fierce claws yet
单选题A faulty thermostatic bypass valve, in a diesel engine cooling system, can result in （）Aexcessive time required for warming-upBexcessive freshwater corrosionCscale formation on the saltwater sideDsaltwater mixing with the freshwater
判断题Fish is the least energy-efficient because most fossil fuel is required in order to catch some fishes.A对B错
单选题The jacket water temperature in a diesel engine closed freshwater cooling system is normally controlled by （）Aregulating the level of corrosion inhibitor in the primary cooling systemBthe level of the freshwater expansion tankCvarying the engine load to meet temperature requirementsDthe operation of the thermostatic valve
单选题Approximately $120 billion in venture capital is estimated as having poured into technology stocks during the late 1990s, creating a valuation bubble that burst in 2000.AApproximately $120 billion in venture capital is estimated as having poured into technology stocks during the late 1990s, creatingBDuring the late 1990s approximately $120 billion in venture capital is estimated to have poured into technology stocks and createdCDuring the late 1990s it is estimated that there was approximately $120 billion in venture capital that was poured into technology stocks, creatingDIt is estimated that during the late 1990s approximately $120 billion in venture capital poured into technology stocks, creatingEIt is estimated that there was approximately $120 billion in venture capital that poured into technology stocks during the late 1990s and created