英语翻译能做出最好了,A door is fitted with a two-way hinge so that it
英语翻译
能做出最好了,
A door is fitted with a two-way hinge so that it can swing in either direction,sketch a graph to show the relationship between the angle the door is open and the time,as someone passes through the door.
clearly explain why the sketch is a reasonable representation of this situation.