Scientists at Washington University School of Medicine in the US found higher levels of protein S1PR2(磷酸鞘氨醇受體蛋白)in tests on the brains of female mice and dead women with MS than in male equivalents.Four times more women than men are currently diagnosed with Multiple Sclerosis(多發性硬化癥).

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

　　Researchers in Missouri looked at relapsing remitting(復發緩解型)MS，where people have distinct attacks of symptoms that tllen fade away either partially or completely.About 85%of all people with MS have this type.Scientists 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 severity.They A.so 100ked at the brain tissue samples of 20 people after they had died.They found high levels of S1PR2 in the areas of the brain typically damaged by 　　MS in both mice and people.Tlle activity of the gene coding for S1 PR2 was positively correlated with the severity of the disease in mice.the study said.

　　Scientists said S l PR2 could work by helping to make the blood-brain barrier,in charge of stopping potentiA.ly harmful substances from entering the brain and spial fluid.more permeable.A more permeable barrier could let attacking cells，which cause MS，into the central nervous system，the study said.This 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 years.She said understanding the causes of MS was a“priority”for the MS Society in the UK.and could be“crucial”in finding new treatments.

　　56.What can we infer from the last sentence in Para.1 ?

　　A. Wbmen are more likely to be diagnosed with Multiple Sclerosis.

　　B.Men are more likely to be diagnosed with Multiple Sclerosis.

　　C.Male mice are more likely to be diagnosed with Multiple Sclerosis.

　　D、FemA.e mice are more likely to be diagnosed with Multiple Sclerosis.

　　57.What problem does MS mainly cause?

　　A.In natured muscle movement.

　　B.Bad bA.ance.

　　C. Disability

　　D.Bad eyesight.

　　58.What is the relationship between the severity ofMS and level ofSlPR2?

　　A. A.The level of S 1 PR2 is higher,the MS is less severe.

　　B.The level of S 1PR2 is higher,the MS is more severe.

　　C. The level of S 1 PR2 is lower,the MS is less severe.

　　D、The level of S 1 PR2 is lower,the MS is more severe.

　　59.What role does SlPR2 play in helping the permeability ofblood.brain barrier?

　　A.It can make blood.brain barrier impermeable.

　　B.It can make blood—brain barrier less permeable.

　　C.It can make blood—brain barrier permeable.

　　D.It can make blood—brain barrier more permeable.

　　60.What can we infer from the whole passage?

　　A.Four times more women than men are currently diagnosed with MS.

　　B. The level of S 1 PR2 was positively correlated with the severity of MS.

　　C.The reason why MS affects more women than men is unknown.

　　D.Multiple sclerosis discovery may explain gender gap.

　　56.What can we infcr from the last sentence in Para.從第一段最后一句話可以推斷出什么?

　　A.Women are more likely to be diagnosed with Multiple Sclerosis.女性更容易被診斷出患多發性硬化癥。

　　B.Men are more likely to be diagnosed with Multiple Sclerosis.男性更容易被診斷出患多發性硬化癥。

　　C.MA.e mice are more likely to be diagnosed with Multiple Sclerosis.雄性小鼠更容易被診斷出患多發性硬化癥。

　　D.FemA.e mice are more likely to be diagnosed with Multiple Sclerosis.雌性小鼠更容易被診斷出患多發性硬化癥。

　　57.What problem does MS mainly cause?MS是導致什么身體問題的主要原因?

　　A.I11.natured muscle movement.肌肉運動。

　　B.Bad balance.平衡性差。

　　C.Disability.殘疾。.

　　D.Bad eyesight.視力不好。

　　58.What is the relationship between the severity of MS and level of SlPR27 MS的嚴重性和SIPR2水平的高低有什么關系?

　　A.I11e level ofSlPR2 is higher,the MS is less severe.SlPR2水平越高，MS越能得到緩解。

　　B.The level ofSlPR2 is higher,the MS is more severe.SlPR2水平越高，MS越來越嚴重。

　　C.The level ofSlPR2 is lower,the MS is less severe.SlPR2水平越低，MS越能得到緩解。

　　D.The level ofSlPR2 is lower,the MS is more severe.SlPR2水平越低，MS越來越嚴重。

　　59.What role does SlPR2 play in helping the permeability ofblood-brain barrier?S1PR2在促進血腦屏障的滲透性方面扮演著什么角色?

　　A.It Can make blood-brain barrier impermeable.它可以使血腦屏障不具滲透性。

　　B.It can make blood.brain barrier less permeable.它可以使血腦屏障減少滲透性。

　　C.It Can make blood。brain barrier permeable.它可以使血腦屏障具有滲透性。

　　D.It Can make blood-brain barrier more permeable.它可以使血腦屏障更具滲透性。

　　60.What Can we infer from the whole passage?從這個文章中可以得出什么推論?

　　A.Four times more women than men are currently diagnosed with MS.診斷出患有多發性硬化癥的女性人數是男性的4倍。

　　B.The level of SlPR2 WaS positively correlated with the severity ofMS.SIPR2所含水平與MS的嚴重程度呈正比關系。

　　C.The reason why MS affects more women than men is unknown.為什么MS會更易對女性造成影響仍不清楚。

　　D.Multiple sclerosis discovery may explain gender gap.多發性硬化癥的發現也許可以解釋性別差異。