职称英语在线答题

每日一练：职称英语考试理工类每日一练(2018/5/4)
【单选题】

Why India Needs Its Dying Vultures
The vultures（秃鹰）in question may look ugly and threatening，but the sudden sharp decline in three species of India's vultures is producing alarm rather than celebration，and it presents the world with a new kind of environmental problem. The dramatic_____（51）_____in vulture numbers is causing widespread disruption to people living in the ____（52）_____areas as the birds. It is also causing serious public health problems _____（53）_____the Indian sub-continent.
While their reputation and appearance may be unpleasant to many Indians，vultures have _____（54）_____played a very important role in keeping towns and villages all over India      （55）. It is because they feed on dead cows. In India，cows are sacred animals and are _____（56）_____left in the open when they die in their thousands upon thousands every year.
The disappearance of the vultures has  _____（57_____an explosion in the numbers of wild dogs feeding on the remains of these_____（58）_____animals. There are fears that rabies（狂犬症） may increase as a result. And this terrifying disease may ultimately（最终）affect humans in the region，_____（59）_____wild dogs are its main carriers. Rabies could also spread to other animal species，_____（60）_____an even greater problem in the future.
The need for action is _____（61）_____，so an emergency project has been launched to find a solution to this serious vulture problem. Scientists are trying to  _____（62）_____the disease causing the birds’ deaths and，if possible，develop a cure.
Large-scale vulture  _____（63）were first noticed at the end of the 1980s in India. A population survey at that time showed that the three species of vultures had declined _____（64）over 90 per cent. All three species are now listed as "critically endangered". As most vultures lay only single eggs and        _____（65）_____about five years to reach maturity，reversing their population decline will be a long and difficult exercise.
51.A  increase        B  threat          C  risk         D  decline
52. A  same            B  small          C  different    D  safe
53.A  above       B  across            C  with           D  through
54.A  rarely      B  recently          C  seldom         D  long
55.A  dangerous   B  smelly            C  clean          D  beautiful
56.A  immediately   B  occasionally    C  traditionally    D  hardly
57.A led to        B acted as        C  come from        D  slowed down
58.A  strange      B  wild         C  endangered          D  dead
59.A  when        B  since        C  so                D  whether
60.A  improving    B  predicting     C  finding      D  causing
61.A  urgent       B  frequent       C  regular      D  sudden
62.A  prove        B  identify       C  test         D  check
63.A  deaths       B  injuries       C  arrivals     D  attacks
64.A  in           B  on             C  by           D  along
65.A  waste        B  consume        C  adopt        D  take