We need to make better use of our resour

题型:阅读理解

问题:

We need to make better use of our resources. In developing countries we have more than enough, if we are less wasteful in our ways. Fortunately, we can improve. The challenge lies not so much with ‘technical fixes’ but with our approach to our world around us. In the recent past we were in a “Wild West” economy, supposing that there would always be enough resources. Now we know there are no new Earth to explore and exploit; one image to illustrate this is to think of Earth as a spaceship, where most materials have to be recycled. For us, “moving on” will be a case of leaving behind the throwaway society and advancing to a conserver society.

To qualify as citizens of a conserver society, we must change traditional attitudes and thinking. We need to recognize that there is not very often such a thing as “waste”, rather, there are materials which sometimes end up in the wrong place. The change has already begun. The European steel industry reuses scrap(废弃的)metal, resulting in an energy saving of up to 50% . Recycling a glass container saves only 18%; but, in parts of the United States, a citizen buying a bottle of soda or beer now pays a deposit against return of the empty bottle.

If all drink containers in the USA were to be reused, the annual saving would be 0.5 million tons glass, plus about 50 million barrels of oil used in production processes. In Japan, OPEC promoted an increase in recycling of raw materials from 16% to 48% in just five years. In Norway, the price of a new car includes a disposal cost element of about 100 dollars, redeemable(可换成现款的)when the junked car is turned in at an approved receiving center.

Major new businesses are trying to exploit waste chemicals and oil. The Chinese claim to reuse 2.5 million tons of scrap iron and at least one million tons of waste paper each year. In the main, the conserver society depends on the commitment of individuals. But they can be encouraged by government incentive(鼓励) and punishment, which should apply at least as strongly to industry and other commercial interests.

73  Which of the following best expresses the meaning of “a conserver society” in the second paragraph?

A. A wasteful society.

B. A society which thinks of  ways of recycling waste materials.

C. A society which keeps everything.

D. A society which saves electricity.

74  In the last paragraph, the author suggests governments _______.

A. depends on individuals to find ways of conserving energy.

B. find ways of encouraging those industries and individuals who conserve energy and of punishing those who don’t.

C. depend on companies to find ways of saving energy and rewarding workers

D. help establish businesses that will exploit waste materials

75  In this passage the author _______.

A. explains that meaning of the “Wild West” economy

B. tells us what recycled materials are.

C. teaches us how to recycle materials.

D. recommend a change in our use of resources strongly

考点:日常生活类阅读
题型:阅读理解

三个质数的乘积恰好等于他们和的11倍,这个三个质数分别是多少?

题型:阅读理解

急性心肌梗死最常见的首发症状是:()。

A.胸痛

B.晕厥

C.急性左心衰

D.休克

E.猝死

题型:阅读理解

如图实-12-10所示为某一热敏电阻(电阻值随温度的改变而改变,且对温度很敏感)的IU关系曲线图.

图实-12-10

(1)为了通过测量得到如图实-12-10所示IU关系的完整曲线,在图实-12-11所示的a和b两个电路中应选择的是图________,简要说明理由:________________________________________________________________________

________________________________________________________________________.[

(电源电动势为9 V,内阻不计,滑动变阻器的阻值为0~100 Ω)

图实-12-11

(2)在图c所示的电路中,电源电压恒为9 V,电流表读数为70 mA,定值电阻R1=250 Ω.则热敏电阻两端的电压为________V;电阻R2的阻值为________Ω.

(3)举出一个可以应用热敏电阻的例子

_______________________________________________________________________.

 

题型:阅读理解

结核性胸膜炎、胸腔积液时,每次抽液不宜过多过快(一般不超过600~800ml),是为了避免()

A.发生感染

B.发生胸膜反应

C.发生胸膜肥厚

D.发生复张性肺水肿

E.发生胸痛

题型:阅读理解

混凝土试块的标准养护环境为温度20±2℃,相对湿度为95%以上,也可以放在温度为20±2℃的不流动的Ca(CO)2饱和溶液中养护。

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