题目内容

【题目】 Yousuf and his family left their home in eastern Afghanistan eight years ago. They went to the city of Kabul to escape war, but they could not escape sadness. Five of Yousuf's children died in the Afghan capital, not from violence, but from air pollution.

Kabul has become one of the most polluted cities in the world. On many days, a mix of smog and smoke lies over the city. In some cases, families burn whatever they can to keep warm in cold weather. The air in their own homes then poisons them. Many years of war have worsened the damage to Afghanistan's environment. At the local Children's Hospital, doctors say they have seen the number of patients with pollution-related health problems increase. Saifullah Abassin, a doctor at the hospital, says his hospital ward(病房) can hold 10 patients but often has three times that number.

“Thirty years ago, it was a wish for people to come to Kabul and breathe its air,” said Ezatullah Sediqi, deputy director for the National Environmental Protection Agency. “But in the wars since, we lost all our urban infrastructure(基础设施) for water, electricity, public transportation, green areas, all these things.”

Kabul's environmental department has started a program to control old vehicles, one major source of pollution. City officials have called on people to use fuel instead of burning garbage for heat. But there are other steps officials need to take, such as passing a plan to stop unplanned development and creating more green spaces.

1What made Yousuf and his family leave their home?

A.War.B.Sadness.C.Violence.D.Air pollution.

2What is NOT the cause of Afghanistan's environment problem?

A.Burning garage.B.Creating green spaces.

C.Using old vehicles.D.Losing urban infrastructure.

3In which part of the newspaper may this text appear?

A.Education.B.Environment.C.Science.D.Culture.

【答案】

1A

2B

3B

【解析】

这是一篇说明文。作者介绍了阿富汗的污染比战争更危险。作者认为虽然环保部门启动了控制污染源的方案,但官方还需要进一步努力来解决污染的问题。

1细节理解题。第一段中的Yousuf and his family left their home in eastern Afghanistan eight years ago. They went to the city of Kabul to escape war, Yousuf和他的家人8年前离开了他们在阿富汗东部的家。为了逃避战争他们去了喀布尔。可知是战争使Yousuf和他的家人离开了家,选项A切题,故选A

2推理判断题。最后一句But there are other steps officials need to take, such as passing a plan to stop unplanned development and creating more green spaces. 但官方还需要采取其他措施,比如通过一项计划来阻止计划外开发,并创造更多的绿地。可知,创造更多的绿地是解决污染问题,而不是阿富汗环境问题的原因,题目问的就是“哪个不是……原因”,选项B创造绿地,切题,故选B

3推理判断题。文章第一段就提出了air pollution,接着又有Afghanistan's environment,还有pollution等,可知,文章是介绍阿富汗日益严重的污染问题,所以这篇文章应该出现在报纸上与环境相关的部分,选项B切题,故选B

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【题目】 A study has shown that severe stress lasting weeks or months can damage cell communications in the brain’s memory areas. Recently, researchers from University of California, Irvine, have provided the first evidence that short-term stress lasting for a few hours has the same effect.

“Stress does exist in our lives and cannot be avoided,” said Dr. Baram, leader of the UC Irvine School. “Our findings can play an important role in the present development of medicine that might prevent these undesirable effects and offer understanding of why some people are forgetful or have difficulty keeping the memories.”

In their study, Baram and her UC Irvine colleagues identified a novel process in which stress caused these effects. They found that, severe stress activated(激活) Corticotropin Releasing Hormones(CRH), which prevented the brain from keeping memory.

Memory takes place at synapses, where there are connections through which brain cells communicate. These synapses lie on dendritic spines(神经元). In rat and mouse studies, Baram’s group saw that the release(释放) of CRH in the brain’s primary memory center led to the rapid breakup of these dendritic spines, which in turn limited the ability of synapses to collect and store memories.

In addition, the researchers reproduced the effects of stress on dendritic spines by keeping low levels of CRH, and watching how the spines ruptured over minutes. “Fortunately, once we removed the CRH, the spines seemed to grow back again, ” Baram said. “And this study can play a role in the creation of treatments to address stress-related memory loss.”

1According to the text, short-term stress can lead to ________.

A.memory lossB.cell decrease

C.head damageD.thought disorder

2The underlined word “ruptured” in Paragraph 5 is closest in meaning to ________.

A.came into beingB.built up

C.broke apartD.died away

3What is the author’s purpose of writing the text?

A.To discuss the main stages of stress.

B.To show the primary cause of stress.

C.To introduce a new finding about stress.

D.To promote an effective treatment for stress.

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