雅思阅读真题重点推荐：Otters水獭
做好雅思的阅读题除了掌握对的方法，也离不开我们日常的辛勤练习，下面小编给大家带来雅思阅读真题重点推荐：Otters水獭，一起加油吧！
雅思阅读真题重点推荐：Otters水獭
re是什么意思 READING PASSAGE 1
新东方四级高频词汇You should spend about 20 minutes on Questions 1-13, which are bad on Reading Passage 1 below.
托福多少分可以出国
设计英语A)Otters are scmiaqualic (or in the ca of the a otter, aquatic) monirnals. rHiey ure mi'inbers of the Mustelid family which includes badgers, polecats, martens, weals, stoats an have inluibited the earth for the last 30 million years and over the years have undergone subtle changes to the carnivore bodies to exploit the rich aquatic environment. Otters have long liiin body and short legs~ideal for pushing den undergrowth or hunting in tunnels. An adult male may be up to 4 feet long and 30 pounds. Females are smaller, around 16 pound
longbeach
s typically. The Eurasian otter no is about ihc smallest among the otter species and has a characteristic shape described as a shidlow "W".An otter's tail (or rudder, or stern) is stoul at tlie ba and tapers towards the tip where il flattens. ITiis forms part of the propulsion unit when swimming fast under water. Oder fur consists of iwo types of hair: stout guard hairs which form a waterproof outer covering, and undcrfiir which is den and fine，equivalent to an otter's thermal underwear. The fur must he kept in good condition by grooming. Sea water reduces the waterproofing and insulating qualities of otter fur when salt water gets in the fur. This is why freshwater pools are important to otters living on the coast. After swimming, they wash the salts ofT in the pools and then squirm on the ground to rub dry against vegetation.
B) Scent is ud for hunting on land, for communication and for detecting danger. Otterine n of smell is likely to similar in nsitivity to dogs. Otters have small eyes and arc probably short-siglited on land. Bui they do have the ability to modify the shape of the lens in the eye to make it more spherical, and hence overcome the refraction of water In clear water and good liglit, otters can hunt fish by sight. The otter's eyes and nostrils ar
e placed high on its head so that it c-an e and breulhc oven when the rest of die body is submerg'd, "The long whiskers growing iinmnd the muzzle are ud to detect the prence of fish. They detect regular vihrutions cruid by the beat of the fish's tail as it swims awuy. I'his tdlows otters to hunt even in very murky water. Underwater, the otter holds its legs against the body, except for steering, and the hind end of the body is flexed in a ries of vertical undulations. River otters have webbing which extends for much of the length of each digit, though not lo the very end. Giant otters ami a otters have even more prominent webs, while the Asian short-clawed otter lias no webbing-they hunt for shrimps in ditches and paddy fields so they need the swimming speed. Otter ears are protected by valves which clo them against water pressure.
C A number of constraints and preferences limit suitable liabitats for otters. Water is a must and the rivers must be large enough to support a healthy population of fish. Being such shy and wary creatures. they will prefer territories where mail's activities do nol impinge grcally. Of cour, there must also be no other otter already in residence-this has only become significant again recently as populalions start to recover. A typical range for
a mule river otter might he 25km of river, a female's range loss than half this. I lowcver, ihc pnMluclivity of the river affecls ihis hugely and one sitidy found male ranges between 12 and 80km. Coastal oilers havr a mucli more abundant Uwd supply aiul ranges for males and females may be just a few kilometers of coastline. Becau male ranges are usually larger, a male otter may find his range overlaps with two or three females. Otters will eat anytliing that they can get hold of there are records of sparrows and snakes and slugs gobbled. Apart from fish the most common prey are crayfish, oralis and water birds. Small munmmls are occasionally taken, most mmmonly rabbits but soinelimes even moles.
节哀顺变英文D )Eurasian otters will bretnJ any time where food is readily available. In places where condition is more vere, Sweden for example where the lakes are frozen for much of winter, cubs arc bom in Spring, This ensures that they are wdl grown before vere weather returns. In the Shetlands. cubs are bam in summer when fish is more abundant. Though otters can breed every year, some do not. Again, this depends on food availability. Other factors such as food range and quality of the female muy have an effect.
Gestation for Eurasian otter is 63 days, with the exception of North American river otter who embryos may undergo delayed implantation.
零基础学英语E )Otters normally give birth in more cure dens to avoid disturbances. Nests are linceing the most common). For some unknown reason, a^astal otters lend to produce smaller litters. At five weeks they open their eyes~a liny cub of 700g. At ven weeks they're weaned onto solid food. At five weeks they leave the nest, blinking into daylight for the first time. After three months they finally meet the water and learn to swim. After eight months they are hunting, though the mother still provides a lot of food herlf. Finally, after nine months she ttan cha them all away with a clear conscience, and relax-until the next fella shows up.
F) The plight of the British oiler was recognid in the early 60s,but it wasn^t until the late 70s that ihe chief cau was discovered. Pcslicides. such as diddrin and aldriiu were first ud in 1955 in iigriculture and other industries--the clicmiads are very persistenl and liad already been recognid as the mu of huge declines in the population of ficregrinc
银行英语
falcons, sparrowhawks and oilier predators. The pesticides entered the river systems and the food chain-micro-organisms. fish and finally otters, with every step increasing ihc concentration of the chemicals. From 1962 the chemicals were phad out, but while some species recovered quickly, otter numbers did not and continued to fall into the 80s/niis was probably mainly to habitat destruction and road deaths. Acting on popuIations fragmented by the sudden decimalion in the 50s and 60s, the loss of just a handful of otters in one area can make an entire population unviable and spoil the end.
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