单词拼写。

1. He was interested in a _____ and always stayed up at  night to watch the stars.

2. Computer hackers have broken down security s ____,  raising questions about the safety

    of information.

3. There is a lot of rubbish ____(漂浮)on the surface of the river.

4. W _____(当心 )out! There is a car coming!

5. Every time an English runner won a race, the crowd c  ____  .

为严肃处理三鹿奶粉事件，国务院启动国家重大食品安全事故Ⅰ级响应，由卫生部公安部、农业部、工商总局、质检总局、食品药品监管局等相关部门和专家等组成应急处置领导小组，查明婴幼儿奶粉污染原因，依法严肃处理违法犯罪分子和相关责任人，全力开展医疗救治，全面开展奶粉市场治理整顿，建立完善食品安全货物质量监管机制。

运用经济常识有关知识，说明国家建立完善食品安全和质量监管机制对企业有何影响。