四六级考试

【单选题】 The best candidates for cornea transplants should________.
A．have a very clear cornea
B．have a normal cornea
C．have a cloudy cornea with some diseases such as glaucoma
D．have a defective cornea without any problems concerned with the optic nerve or retina

网考网参考答案：D
网考网解析：
[解析]事实细节题。本题可参考文章第五段第一句：The best candidates for corneal transplants have a cloudy，scarred，or misshapen cornea，but are without any underlying disease，such as glaucoma(青光眼)。or problems involving the optic nerve or retina．(最适合接受角膜移植的人，他的角膜可以是模糊不清的、或有伤疤的、或者畸形，但决不能有隐患，如青光眼或有视觉神经或视网膜疾病。)第二句引述医学专家的话对此加以补充说明，D)项“有缺陷但不是视觉神经或视网膜疾病的角膜”正是文章所表达的含义。 查看试题解析出处>>