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【简答题】
请翻译下面一段话: Mechanics deals with two kinds of quantities: scalars and vectors. Scalar quantities are those with which a magnitude alone is associated. Examples of scalar quantities in mechanics are time, volume, density, speed, energy, and mass. Vector quantities, on the other hand, possess direction as well as magnitude. Examples of vectors are displacement, velocity, acceleration, force, moment, and momentum.
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皮皮学刷刷变学霸
举一反三
【多选题】下列各项中,层高不足2.2m者应计算1/2建筑面积的是( ) 答案:AE
A.
多层建筑物
B.
场馆看台
C.
多层建筑物坡屋顶
D.
建筑物外有围护设施的走廊
E.
地下室