锅炉房如设在多层或高层建筑的半地下室或第一层中，则必须有（）。
参考答案：安全疏散通道
( )是证明投资各方投入财产价值的有效依据。
A．价值鉴定证书
B．出入境检验检疫证书
C．价值审核证书
D．出入境审核受理证书
The loading, unloading, transshipment and transit of inward and outward mail bags are subject to Customs control and a ______ wya bill should be submitted to the Customs by the enterprise providing prviding postal service.
A．cover B．coveringC．covered D．haveing covered
