问题 选择题

2012年端午节假期,某市“尾货”市场火爆。一件衬衣10元、一条牛仔裤20元,衣服便宜的程度让人感叹不已。为此,业内专家指出,“尾货”降价决不是一种简单的让利行为。这表明了

①降价能导致商品价值增加

②降价让利促进社会再生产顺利进行

③产品价格高低可以影响市场需求

④商品的消费量决定商品是否降价

A.①②

B.③④

C.①④

D.②③

答案

答案:D

题目分析:价值决定价格,价格表现价值,但是价格不能影响价值,①不正确,答案在BD间,就看②和④了,供求只能影响价格,而不能决定价格,因此说“商品的消费量决定商品是否降价”是错误的,正确答案是D。

点评:在社会主义市场经济体制情况下,商品的价格是由价值决定的,并受供求的影响,这里尤其需要注意的是“决定”这个词比较特殊,是固定搭配,不能随便使用。

阅读理解

Australian scientists are trying to give kangaroo-style stomachs to cattle and sheep in order to cut the greenhouse gases they send out,which is thought to be responsible for global warming.

Thanks to special bacteria in the stomachs,kangaroo flatulence(肠胃气胀)contains no methane(甲烷)and scientists want to transfer that bacteria to cattle and sheep which produce large quantities of the harmful gas.

While the usual image of greenhouse gas pollution is a huge factory chimney pushing out carbon dioxide,farm animals’ passing wind contributes to a surprisingly high percentage of total emission(排放物)in some countries.

“Fourteen percent of emissions from all sources in Australia is from methane from cattle and sheep,’’said Athol Klieve,a senior research scientist with the Queensland state government.

“And if you look at another country such as New Zealand,which has got a much higher agricultural base,they are actually up around 50 percent,”he said.

Researchers say the bacteria also make the digestive process much more efficient and could potentially save millions of dollars in feed costs for farmers.

But it will take researchers at least three years to isolate the bacteria before they can even start to develop a way of transferring it to cattle and sheep.

Another group of scientists,meanwhile,has suggested Australians should farm fewer cattle and sheep and just eat more kangaroos.And about twenty percent of health-conscious Australians are believed to eat the national symbol already.

“It’s low in fat,it’s got high protein levels and it’s very clean in the sense that basically it’s the free-range(放养的)animal,”said Peter Ampt of the University of New South Wales’s institute of environmental studies.

小题1:The passage mainly talks about ________.

A.a better way to prevent air pollution

B.the danger of methane from farm animals

C.possible solutions to protecting environment

D.a recent research on global warming小题2: Scientists intend to put the bacteria into cattle and sheep in order to ________.

A.prevent them from sending out harmful gases

B.promote Australian farming

C.protect Australian ecosystem

D.make the most of the special bacteria小题3:Another possible solution to the problem is ________.

A.to reduce the number of animals raised on farms

B.to eat more kangaroos rather than keep more sheep and cattle

C.to eat more plants rather than beef and mutton

D.to grow more trees to absorb carbon dioxide小题4:From the passage we learn that ________.

A.it is easy to transfer the bacteria to cattle and sheep

B.farm animals are to blame for global warming in some countries

C.cattle and sheep produce more methane than kangaroos

D.less cattle and sheep are raised in New Zealand

单项选择题