题目

Modern computer technology has made online friendship possible. Online friends are people who have known each other through the Internet. Are online friendships as beneficial as face-to-face friendships? Can people form strong relationships online? When you use social networking websites and chat rooms, you can easily find people with interests and hobbies similar to yours. Making friends on the Internet is especially good for shy people who feel uncomfortable in social situations. It’s often easier to share thoughts and feelings online. What’s more, online friends can make people在某小说里，有这样一个故事情节：女盗“独一枝”的助手丽卡溜进某亿万富翁家里，找到了地下室的金柜．她知道，只要打开金柜，剩下的事就好办了．有关金柜的密码，“独一枝”是这样告诉她的：“金柜上放着一本厚约500页的书，有一书签夹在书中，夹着书签的那两页书的页码和就是密码”．若书签可能夹在：①85页～86页之间；②413页～414页之间；③420页～421页之间．则你认为金柜的密码是 ．