解除机动车交通事故责任强制保险合同的，保险公司应当收回保险单和（）
A、保险合同
B、保险回执
C、保险赔款
D、保险标志
参考答案：D
Half of the work ______ by now. [ ]
A. has finished
B. has been finished
C. have been finished
钢筋切断机切短料时，手和切刀之间的距离应保持在150mm以上，如手握端小于（）时，应采用套管或夹具
A.150mm
B.200mm
C.400mm
D.500mm
