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1、2021年职称英语考试理工类B级阅读试题及答案9_职称英语BDangers Await Babies with AltitudeWomen who live in the worlds highest communities tend to give birth to underweight babies, a new study suggests.These babies may grow into adults with a high risk of heart disease and strokes.1Research has hinted that newborns in mounta
2、in communities are lighter than average.But it wasnt clear whether this is due to reduced o_ygen levels at high altitudes or because their mothers are under-nourished many people who live at high altitudes are relatively poor compared with those living lower down.To find out more, Dino Giussani and
3、his team at Cambridge University studied the records of 400 births in Bolivia during 1997 and 1998.The babies were born in both rich and poor areas of two cities: La Paz and Santa Cruz.La Paz is the highest city in the world, at 3.65 kilometers above sea level, while Santa Cruz is much lower, at 0.4
4、4 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 and low-income families.Even babies born to poor families in Santa Cruz were heavier on average than babies born to wealthy families in loft
5、y La Paz.“We were very surprised by this result,” says Giussani.The results suggest that babies born at high altitudes are deprived of2 o_ygen before birth.“This may trigger the release or suppression of hormones that regulate growth of the unborn child,3” says Giussani.His team also found that high
6、-altitude babies tended to have relatively larger heads compared with their bodies4.This is probably because a fetus starved of o_ygen will send o_ygenated blood to the brain in preference to the rest of the body.5Giussani wants to find out if such babies have a higher risk of disease in later life.
7、People born in La Paz might be prone to heart trouble in adulthood, for e_ample.Low birth weight is a risk factor for coronary heart disease.And newborns with a high ratio of head size to body weight are often predisposed to high blood pressure and strokes in later life.词汇: altitude /5Altitju:d/ n.纬
8、度，(海拔)高度 stroke /strEuk/ n.中风thgiewhtrib n.出生体重 hint /hint/ v.暗示 coronary /5kCrEnEri/ adj.冠状的 hormone /5hC:mEun/ n.荷尔蒙 under-nourished adj.营养不足的 fetus /5fi:tEs/ n.胚胎underweight /7QndE5weit/ adj.重量不足的 注释:1. grow into adults with a high risk of heart disease and strokes：长大成人后得心脏病和中风的风险很大2. are deprive
9、d of：被剥夺了，缺乏3.This may trigger the release or suppression of hormones that regulate growth of the unborn child：这可能会触发调节未出生儿成长的荷尔蒙的释放或抑制。这里的 release是名词。4.relatively larger heads compared with their bodies：相对身体来说较大的头部5. a fetus starved of o_ygen will send o_ygenated blood to the brain in preference to
10、 the rest of the body：一个缺乏氧的胚胎会首先把充氧的血液输送到脑部，然后才送到身体的其他部位。 starved of是分词短语，修饰 fetus，in preference to表示的是第二位的选择，如： I chose to study English in preference to Russian in university.读大学时，我选了英语，而不是俄语。练习：1.According to the passage，one of the reasons why newborns in mountain communities are underweight is
11、that their mothers are under-nourished.A Right B Wrong C Not mentioned2.Giussanis team members are all British researchers and professors from Cambridge University.A Right B Wrong C Not mentioned3.Giussani did not e_pect to find that the weight of a baby had little to do with the financial condition
12、s of the family he was born into.A Right B Wrong C Not mentioned4.The weight of a newborn has to do with the supply of o_ygen even when he was still in his mothers womb.A Right B Wrong C Not mentioned5.High-altitude babies have heads that are larger than their bodies.A Right B Wrong C Not mentioned6.High-altitude babies have longer but thinner limbs than average.A Right B Wrong C Not mentioned第 5 页 共 5 页