2015年6月英语四级考试真题之阅读

　　Questions 56 to 60 are based on thefollowing passage.

Scientists at Washington University School of Medicine in the US found higher levels of protein S1PR2(磷酸鞘氨醇受体蛋白)in tests on the brains of female mice and dead women with MS than in male times more women than men are currently diagnosed with Multiple Sclerosis(多发性硬化症).

Experts said the finding was”really interesting” affects the nerves in the brain and spinal cord，which causes problems with muscle movement，balance and is a major cause of disability,and affects about 1 00，000 people in the rmal immune cells aRack nerve cells in the central Nervous system in MS e is currently no cure，gh there are treatments that can help in the early stages of the disease.

Researchers in Missouri looked at relapsing remitting(复发缓解型)MS，where people have distinct attacks of symptoms that tllen fade away either partially or t 85%of all people with MS have this ntists studied the blood vessels and brains of healthy mice，mice with MS，and mice without the gene for SlPR2，a blood vessel receptor protein，to see how it affected MS 100ked at the brain tissue samples of 20 people after they had found high levels of S1PR2 in the areas of the brain typically damaged by 　　MS in both mice and activity of the gene coding for S1 PR2 was positively correlated with the severity of the disease in study said.

Scientists said S l PR2 could work by helping to make the blood-brain barrier,in charge of stopping p harmful substances from entering the brain and spial permeable.A more permeable barrier could let attacking cells，which cause MS，into the central nervous system，the study link[between MS and S lPR2] is completely new一it has never been found before.

Dr Emma Gray,of the MS Society,said：”We don’t yet fully understand why MS affects more women than men,and it’s an area that’s intrigued scientists，and people with MS，for many said understanding the causes of MS was a“priority”for the MS Society in the could be“crucial”in finding new treatments.

　　 can we infcr from the last sentence in Para.从第一段最后一句话可以推断出什么?

n are more likely to be diagnosed with Multiple Sclerosis.女性更容易被诊断出患多发性硬化症。

are more likely to be diagnosed with Multiple Sclerosis.男性更容易被诊断出患多发性硬化症。

.e mice are more likely to be diagnosed with Multiple Sclerosis.雄性小鼠更容易被诊断出患多发性硬化症。

.e mice are more likely to be diagnosed with Multiple Sclerosis.雌性小鼠更容易被诊断出患多发性硬化症。

　　 problem does MS mainly cause?MS是导致什么身体问题的主要原因?

red muscle movement.肌肉运动。

balance.平衡性差。

bility.残疾。.

eyesight.视力不好。

　　 is the relationship between the severity of MS and level of SlPR27 MS的严重性和SIPR2水平的高低有什么关系?

A.I11e level ofSlPR2 is higher,the MS is less 2水平越高，MS越能得到缓解。

level ofSlPR2 is higher,the MS is more 2水平越高，MS越来越严重。

level ofSlPR2 is lower,the MS is less 2水平越低，MS越能得到缓解。

level ofSlPR2 is lower,the MS is more 2水平越低，MS越来越严重。

　　 role does SlPR2 play in helping the permeability ofblood-brain barrier?S1PR2在促进血脑屏障的渗透性方面扮演着什么角色?

Can make blood-brain barrier impermeable.它可以使血脑屏障不具渗透性。

can make n barrier less permeable.它可以使血脑屏障减少渗透性。

Can make blood。brain barrier permeable.它可以使血脑屏障具有渗透性。

Can make blood-brain barrier more permeable.它可以使血脑屏障更具渗透性。

　　 Can we infer from the whole passage?从这个文章中可以得出什么推论?

times more women than men are currently diagnosed with MS.诊断出患有多发性硬化症的'女性人数是男性的4倍。

level of SlPR2 WaS positively correlated with the severity 2所含水平与MS的严重程度呈正比关系。

reason why MS affects more women than men is unknown.为什么MS会更易对女性造成影响仍不清楚。

iple sclerosis discovery may explain gender gap.多发性硬化症的发现也许可以解释性别差异。