白内障是由于
A.玻璃体浑浊B.晶状体浑浊C.角膜浑浊D.角膜白斑E.结膜浑浊
参考答案:B
解析:白内障就是由于各种原因导致的晶状体蛋白变性浑浊,致使视力下降。
(1)两车相遇前,乙车经过多少时间两车间距离最大?
(2)最大距离是多少?
Our holiday is doomed to failure without you.
A.would doom
B.would have been doomed
C.had been doomed
D.has had to be doomed