效益背反
参考答案:
效益背反指的是物流的若干功能要素之间存在着损益的矛盾,即某一个功能要素的优化和利益发生的同时,必然会存在另一个或另几个功能要素的利益损失,反之也如此。
阅读下面的短文,从四张图片中找出一个正确对象。
Hello. My name's Susan. I'm twelve years old. Look! This is a picture of my family. This is my mother
and this is my father. This is my brother. His name is Simon. There is also my dog too. His name is Bobby.
1. 2.
3. 4.
脱硝系统一般由还原剂系统、催化反应系统、()、辅助系统等组成。
A.公用系统
B.汽水系统
C.给水系统
D.制浆系统