缓冲器作用时对减速度有何要求？
参考答案：
轿厢在额定栽荷下平均减速度不超过1g；减速度超过2.5g的时间不超过0.04秒。
This is the hotel _______last month.
A．which they stayed
B．at that they stayed
C．where they stayed at
D．where they stayed
工官
