每当库存余额降至订货点时,就发出固定批量的订货行为,称为( )。
A. 固定订货量系统
B. 固定间隔期系统
C. 随机型库存控制系统
D. 一次性订货量系统
The lecturer introduces several words and phrases related to environment, including industrial emission, _______ and deforestation, etc.
A. allienation
B. sustainability
C. renewableresource
D. E-waste
The lecturer summarizes the relationship between nature and humans to be ____and ____, not static and still.
Towards the end of the video, Nature is Speaking, Nature says it is prepared to ____with or without us humans.