Question

【題目】Australian scientists are trying to give kangaroo-style stomachs to cattle and sheep in a bid to cut the emission of greenhouse gases blamed for global warming.

Thanks to special bacteria in their stomachs, kangaroo farts contain no methane (甲烷)and scientists want to transfer that bacteria to cattle and sheep who emit large quantities of the harmful gas.

While the usual image of greenhouse gas pollution is a billowing smokestack pushing out carbon dioxide，livestock passing wind contribute a surprisingly high percentage of total emissions in some countries.

"Fourteen percent of emissions from all sources in Australia is from enteric 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're actually up around 50 percent," he said.

Researchers say the bacteria also makes 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.

The idea is controversial (爭議)，but about 20 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 ultimate free range animal (散養(yǎng)動物)，" said Peter Ampt of the University of New South Wales's institute of environmental studies.

【1】 According to the passage, global warming is now mainly caused by ______.

A. methane B. carbon dioxide

C. livestock passing wind D. not mention in this passage

【2】 What does the underlined phrase "the idea" (Paragraph 9)refer to?

A. Australians should give kangaroo-style stomachs to cattle and sheep.

B. The bacteria could make the digestive process much more efficient.

C. Australians should farm fewer cattle and sheep and just eat more kangaroos.

D. The bacteria could potentially save millions of dollars in feed costs for farmers.

【3】How will Australian scientists solve the problem of global warming?

A. Eating more kangaroos.

B. Killing more cattle and sheep.

C. Letting cattle and sheep pass less wind.

D. Transferring the special bacteria in kangaroos' stomachs to cattle and sheep.

Answer 1

【答案】【1】 D

【2】 C

【3】 A

【解析】【1】細節(jié)理解題。A、B、C三項均是導致全球變暖的原因，但文中并沒有提到哪一個是主要原因，選項D文中沒有提到。

【2】詞義猜測題。從上文“另一組科學家建議澳大利亞人應少養(yǎng)牛羊，多吃袋鼠肉”及下文“盡管這一觀點有爭議，但目前約有20%健康意識較強的澳大利亞人已經(jīng)吃上了被視為”國家象征“的袋鼠”可知，這一觀點指的是上文“澳大利亞人應少養(yǎng)牛羊，多吃袋鼠肉”。

【3】推理判斷題。從文章第一、二段“為了減少導致全球變暖的溫室氣體的排放，澳大利亞科學家目前正在想辦法將牛羊的胃變成袋鼠式的胃。袋鼠胃中有一種特殊的細菌能 使其放的屁中不含有甲烷�？茖W家想將這種細菌移至牛羊的胃中，以抑制它們所排放的大量有害氣體”推斷得知。