简述水力旋流器的结构。
参考答案:
水力旋流器主要由进液分配器、旋流子、上部稀液储存箱及底部石膏浆液分配器组成。旋流子是利用离心力的原理,其分离效果通过进液压力来控制。
按要求改写句子。
1. People are supposed to shake hands when they meet for the first time. (对画线部分提问)
_______ _______ people supposed to_______ when they meet for the first time?
2. We usually make plans to see friends. (改为同义句 )
We usually ______ _______ see friends.
3. Someone invited me to go to the restaurant to have dinner.(改为被动语态)
I ______ _______ to go to the restaurant to have dinner.
4. You should give him something to eat for breakfast.(改为否定句)
You ______ give him _______ to eat for breakfast.
5. People have pretty relaxing rules in Colombia.(对画线部分提问)
_______ _______ _______ rules do people have in Colombia?
开展预防性卫生监督工作必须依据
A.法规和各种卫生标准
B.法律、法规、条例和标准
C.宪法、法律、规章和各种标准
D.法律、卫生法规、规章、规范性文件及标准
E.《工业企业设计卫生标准》(TJ36-79)和《工业企业建设项目卫生预评价规范》