一个正方形至少需要转（ ）度的角度能和原正方形重合。
90
The hurricane damaged many houses and business buildings; ___________, it caused 20 deaths.
A．or else
B．therefore
C．after all
D．besides
何为物流基础模数尺寸？国际标准化组织（ISO）中央秘书处和欧洲各国确定的物流基础模数尺寸标准是多少？
