【单选题】当物料提升机安装高度大于或等于( )m时,不得使用缆风绳。
【单选题】Language learning and teaching must be viewed in a __________, setting, or background.
【单选题】The main point of the passage is that ______.
A.
background music is a good thing
B.
background music is a bad thing
C.
it is important to use background music in the right way
D.
the Americans are good at using background music
【单选题】当物料提升机安装高度大于或等于()m时,不得使用缆风绳。
【单选题】下列( )项不属于应收账款成本的构成要素。
【单选题】下列( )项不属于应收账款成本的构成要素。