缔约过失责任
参考答案：
Be careful when you cross this very busy street.If not ,you may _____run over by a car .
A．have
B．get
C．become
D．turn
皮辊直径一般打磨至（）左右时，其橡胶层要进行更新。
A、47mm
B、60mm
C、69mm
D、77ram
