建设中国特色社会主义伟大实践的经验，集中到一点就是要毫不动摇地坚持党在社会主义初级阶段的基本路线。下列对党在社会主义初级阶段的基本路线理解正确的是（   ）
①其核心内容是“一个中心、两个基本点”
②在实现共产主义前我们要一直坚持党的基本路线
③党的基本路线体现了全国各族人民的根本利益和共同愿望
④关键是坚持以经济建设为中心

309×34=____    950×60=____

3276÷84=____   708÷59=____

    It was Mr. Hill's birthday. He was one hundred ____old and many people ____to his birthday party. A reporter came to the party and ask him a few ____."Many people want to know how you keep ____," the reporter said, "Could you ____us about  it " "That is because I____get up at six in the morning," said Hill."And have three ____ a day and ____ drink alcohol(酒)" "Really? said the reporter, "my uncle also did the ____,and he only lived to ____ eighty. What do you think of that?" "He didn't keep it long enough,"  the old man answer.

防腐剂是食品____过程中添加进去的防止食物____的____添加剂。