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职称英语考试真题综合类B级阅读理解(3)

发布时间:2017-01-23        来源:华商教育
导读:职称英语考试真题综合类B级阅读理解。

  Dangers await babies with altitude

  Women who live in the wld's highest communities tend to give birth to under-weight babies, a new study suggests. These babies may grow into adults with a high risk of heart disease strokes.

  Research has hinted that newbns in mountain communities are lighter than average. But it wasn't clear whether this is due to reduced oxygen levels at high altitude because their mothers are under-nourished — many people who live at high altitudes are relatively po compared with those living lower down.

  To find out me, Dino Giussani his team at Cambridge University studied the recds of 400 births in Bolivia during 1976 1998. The babies were bn in both rich po areas of two cities: La Paz Santa Cruz. L Paz is the highest city in the wld, at 3.65 kilometers above sea level, while Santa Cruz is much lower, at 0.44 kilometers.

  Sure enough, Giussani found that the average birthweight of babies in La Paz was significantly lower than in Santa Cruz. This was true in both high low-income families. Even babies bn to po families in Santa Cruz were heavier on average than babies bn to wealthy families in lofty La Paz. "We were very surprised by this result," says Giussani.

  The results suggest that babies bn at high altitude are deprived of oxygen befe birth. "This may trigger the release suppression of hmones that regulate growth of the unbn child," says Giussani.

  His team also found that high-altitude babies tended to have relatively larger heads compared with their bodies. This is probably because a fetus starved of oxygen will send oxygenated blood to the brain in preference to rest of the body.

  Giussani wants to find out if such babies have a higher risk of disease in later life. People bn in La Paz might be prone to heart trouble in adulthood, f example. Low birth weight is a risk fact f conary(冠状的) heart disease. And newbns with a high ratio of head size to body weight are often predisposed to high blood pressure strokes in later life.

  41. What does the new study discover?

  A. Babies bn to wealthy families are heaver.

  B. Women living at high altitude tend to give birth to underweight babies.

  C. Newbns in cities are lighter than average.

  D. Low-altitude babies have a high risk of heart disease in later life.

  参考答案:B

  42. Giussani his team are sure that _____.

  A. babies bn in Lance Paz are on average lighter than in Santa Cruz.

  B. people living at high altitudes tend to give birth to underweight babies.

  C. the birth weight of babies bn to wealthy families is Santa Cruz.

  D. mothers in La Paz are commonly under-nourished.

  参考答案:A

  43. It can be inferred from what Giussani says in Paragraph 4 that_____.

  A. the finding was unexpected

  B. he was very tired.

  C. the study took longer than expected.

  D. he was surprised to find low-income families in La Paz.

  参考答案:A

  44. The results of the study indicate the reason f the underweight babies is _____.

  A. lack of certain nutrition.

  B. power of their mother.

  C. different family backgrounds.

  D. reduction of oxygen levels.

  参考答案:D

  45. It can be learned about fm the paragraph that_____.

  A. high-altitude babies tend to have high blood pressure in later life.

  B. under-weight babies have a shter life span.

  C. babies bn to po families lack hmones befe birth.

  D. new bn wealthy families have larger heads compared with their bodies.

  参考答案:B


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