问题 综合

阅读以下材料,回答问题。(10分)

材料1:目前我国耕地面积只有18.51亿亩。人均耕地仅有1.43亩,不到世界人均水平的40%。近7年来,全国耕地减少了1亿亩。从耕地的质量来看,我国耕地中高产稳产田占1/3。

材料2:下图为近年来耕地减少的因素构成图。

(1)我国耕地比重小的原因主要是(  ) (2分)。

A.人口众多                  B.山地多,平地少

C.退耕还林工作显著      D.农村建房乱占耕地

(2)我国人均占有耕地面积在减少,其直接原因是(  ) (2分)。

①过度抽取地下水 ②草场普遍超载 ③人口的不断膨胀 ④城市化进程的加快

⑤不合理的灌溉方式 ⑥流水侵蚀和风沙危害的加剧

A.①②③④     B.③④⑤⑥      C.①③⑤      D.②④⑥

(3)生态退耕导致耕地减少,但从长远意义来看,生态退耕有利于改善环境的质量。简要分析生态退耕的环境效益。(6分)。

答案

(1)B 

(2)B

(3)生态退耕还草,有利于在干旱地区防风固沙,保护农田; 退耕还林,有利于在水土流失地区涵养水源,保持水土;  生态退耕扩大湖泊、沼泽面积,有利于调节气候;有利于保护生物多样性,使水循环活跃, 促进生态环境良性循环。(答出三点即可)

题目分析:

第(1)题,我国山区面积广,大约占全国面积的2/3。平地占1/3,耕地比重只有1/10。故选B项。

第(2)题,过度抽取地下水容易导致地面下沉等,过度放牧容易导致草场退化。而占用基本农田,主要是城市开发区的规模不断扩大,数量不断增多使耕地面积减少;不合理的灌溉方式、流水侵蚀和风沙危害的加剧导致耕地面减少;人口的不断膨胀也增加了居住用地、工业用地占用耕地。所以本题选择B选项。

第(3)题,本题考查可持续发展的途径。主要从生态退耕的不同模式来进行分析。

点评:本题是材料分析题,通过材料和饼状图考查我国耕地现状及生态退耕的效益,难度较小。另外本题也考查了学生的语言组织能力与学生对所学知识的灵活运用能力。

阅读理解

When Mary Barra took the wheel at General Motors in January she inherited a company in good shape. Five years after bankruptcy(破产), its profits were beyond expectations and its share price was rising. But the new boss's to-do list was long: fixing GM's loss-making European arm, keeping up momentum(势头) in China amid signs of a slowdown and giving new life to the product line. The former CEO, Dan Akerson, warned her that she would also face unexpected challenges. The first has arrived sooner than she might have expected.

What appeared to be a routine recall(召回) of about 800,000 older models, linked to a faulty ignition(点火) switch, has turned out to be anything but. The number of cars recalled has leapt to more than 2.6 million. The company's clumsy handling of a safety problem that first became apparent a decade ago is now linked to the deaths of at least 13 motorists.

Called before Congress to answer for GM's failings Ms Barra said she was “deeply sorry” but insisted that the post-bankruptcy “new GM” was not like the “old GM”, which had failed to deal with the ignition switches for years. Politicians and the public alike want to know how such a problem could have remained unaddressed for so long.

Cars are becoming ever more complex machines, with thousands of mechanical and electronic parts. Last year it happened to 22 million vehicles in America, compared with 18 million in 2012. In fact, GM was one of only three brands that recalled fewer vehicles than it sold. Minor problems, like squeaks(吱吱响) or rattles(卡嗒响), that do not affect safety are more common still. They may be fixed at a routine service; the owner may never know. The growing number of recalls is proof to an improving system for picking up faults.

But it is very complicated. Dealers must record replacements of parts under warranty(保修). The carmaker needs to spot the trend, recognize it as a problem and then determine whether or not it is a design fault that requires an extensive replacement. It relies on accurate recording of every warranty replacement in every region. This system appears to have broken down at “old GM”. Ms Barra needs to find out why.

The core problem is a widely used ignition switch that has a tendency to slip from the “on” position to “off” if a driver uses a heavy key-chain or bounces down a rough road. An improvement was made in 2008 to prevent the problem, which can lead to the engine shutting off, disabling the airbags. But despite a growing list of crashes and deaths, GM failed to order a recall for a component that would have cost a few dollars at most.

This is odd. Most carmakers want to identify and fix problems speedily despite having to bear the cost of buying and fitting a new component. A small part can do great harm, if bad publicity leads to reputational collapse, lost sales and law suits, including heavy penalties. Appearing to put profits before safety is an invitation to battering a firm's shares, as GM has discovered.

So far Ms Barra has handled the situation well. She seems to have acted as soon as she found out something was wrong. GM has appointed a worldwide safety president to cut through the process that may have delayed investigation and action. And in a sweeping housecleaning, GM has recalled another 2 million vehicles in America alone. GM looks set to accept moral, if not legal, responsibility. The terms of its exit from bankruptcy give immunity to lawsuits for injuries arising beforehand. But GM is likely to compensate survivors’ and victims' families anyway.

It is not yet clear how much of a hammering GM will take. But hours before Ms Barra's meeting with Congress, the Insurance Institute for Highway Safety issued a greatly desired “Top Safety Pick” for the new Chevrolet Malibu, one of a growing number of well-received cars from GM.

小题1:When Mary Barra took office, there was plenty more room for GM's improvement in that ________.

a. the development of Chinese market appears to be slowing down

b. former bosses have failed to fix GM's loss-making European arm

c. some car models lack appeal in the market

d. Mr. Akerson has left some challenges for her to handle

e. GM’s management teams are made up mainly of men

A. a, b, and e

B. b, c, and d

C. a, b, and c

D.a, c and d小题2:What can be inferred from Paragraph 4?

A.Problems like squeaks or rattles are frequent reasons for recalls.

B.Recalls are not uncommon in the auto industry.

C.Car companies welcome recalls to demonstrate improved products and services.

D.Minor problems may be fixed at a routine service without the owners’ knowledge.小题3:Mary Barra has carried out the following strategies to manage the crisis and quiet the critics EXCEPT that ________.

A.as soon as she learned about the problem, she acted without hesitation

B.she faced facts and apologized sincerely

C.she took the legal responsibilities for their previous mistakes

D.she appointed a new president for global safety for GM小题4:What does the underlined word “battering” in paragraph7 probably mean?

A.Benefiting.

B.Regulating.

C.Purchasing.

D.Damaging.小题5:What can we infer from GM's new Malibu being awarded “Top Safety Pick”?

A.GM's new model Malibu is specially designed to solve ignition problems.

B.GM products are gaining more and more popularity around the world.

C.GM seems to be on the road to saving itself from mistakes.

D.GM has worked out a solution to the broken-down recall system.

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