题目

 Food safety is a problem in all places around the world and people in different areas of the world prepare foods in different ways. The WHO released (发布) five simple rules for preparing food in a safe way. They call these rules the “Five Keys to Safer Food”. Key 1: Keep clean 36 . People should wash their hands often — before touching food and while they are preparing food. People should wash all surfaces and equipment used for preparing food. Key 2: Separate raw (生的) and cooked Raw foods should not touch prepared foods.  37 . Key 3:  38People should cook eggs and若==，那么a=________，b=________．