第8题: [单项选择]代谢性白内障,以哪种疾病为最常见() A. 中毒性 B. 手足搐搦症 C. 肌强直性营养不良 D. 糖尿病 E. 硬皮症 参考答案:D 答案解析:糖尿病目前是一个高发病,患者血糖升高时进入晶状体内的葡萄糖增多,己糖激酶被饱和,醛糖还原酶活化,将葡萄糖转化为山梨醇在晶状体储积,细胞内渗透压升高,晶状体纤维吸水肿胀易引起混浊。
第17题: [单项选择]The Portuguese give a great deal of credit to one man for having promoted sea travel, that man ______ prince Henry the navigator, who lived in the 15th century. A. was B. was called C. calling D. being 参考答案:D 答案解析:后半句是独立结构,是one man的同位语。A、B用了动词形式,不可;C项应为被动语态。