|
第3部分：概括大意与完成句子(第1~8题，每题1分，共8分) 阅读下面这篇短文，短文后有2项测试 任务：(1)第1-4题要求从所给的6个选项中为第2-5段每段选择1个正确的小标题;(2)第5-8题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。 Facts about Stroke 1 Every 45 seconds,someone in America has a stroke.Every 3.1 minutes,someone dies of one.Stroke killed an estimated 167,661 people in 2000 and is the nations third leading cause of death,ranking behind diseases of the heart and all forms of cancer.Stroke is a leading cause of serious,long-term disability in the United States. 2 Stroke is a type of cardiovascular(心血管的)disease.It affects the arteries(动脉)leading to and within the brain.A stroke occurs when a blood vessel that carries oxygen and nutrients(营养物)to the brain is either blocked by a clot(凝块)or bursts.When that happens,part of the brain cannot get the blood(and oxygen)it needs,so it starts to die. 3 The brain is an extremely complex organ that controls various body functions.If a stroke occurs and blood flow cant reach the region that controls a particular body function,that part of the body wont work as it should.If the stroke occurs toward the back of the brain,for instance,its likely that some disability involving vision will result.The effects of a stroke depend primarily on the location of the obstruction(阻塞)and the extent of brain tissue affected. | 
