简述豆腐乳和腊八豆配料加黄酒的作用。
参考答案：
⑴制止杂菌生长⑵于有机酸形成酯类物质，促使香气形成⑶有利于霉的浸提。
Now the environment in city is _______ than it was before. We should keep it clean. [ ]
A. much better
B. more worse
C. more better
D. much worse
工作人员在10kV及以下电压的电气设备上作业时，人体与导体间的安全距离是30cm
