Do you know who invented the slide – fastener, or rather, the zipper （拉链）? No one thought of anything like the zipper until Whitcomb Judson came along. Judson’s slide-fastener was an out-o
John Smith，an office worker，lives in Washington．He inherited (继承) a million dollars when he was 23，but he wasn’t happy at a11．When his college friends were looking for their jobs，
