【单选题】在JavaScript中表示逻辑与的运算符号是( )。
【简答题】“学生是具有独立意义的人。”这句话的含义是什么?
【单选题】体育产业发展有利于优化产业结构,体现了体育的_________功能。
【简答题】翻译句子 The hardness of a gear determines its ability to resist wear.
【单选题】集合A={x|x∈N * ,(6/(6-x)) ∈N}用列举法可表示为( )
【简答题】已知全集U=N,集合A={x∈R|x>5},则C ∪ A用列举法表示为______.
【简答题】翻译下面句子: Hardness is that property in steel which resists indentation. It is the ability of a material to resist penetration and abrasion. Hardness is usually expressed in terms of the area of an inden...