机械轨道衡是利用杠杆()原理制成的大型衡器,分为工作轨道衡和标准轨道衡。
A、传力;
B、传量;
C、平衡。
参考答案:C
In our dormitory, we are all friendly to each other. It makes us like a big family.
A. feeling B. feel C. to feel
按键紧急情况处置的原则有?