Free pratique means that （）. ["clearance requirements for all regulatory bodies have been met","health requirements have been met and no further quarantine formalities are required","shipment will be made at no cost","tonnage taxes are not required to be paid"]
根据历史经验数据，当产品处于投入期时，其销售增长率一般会低于（） ["10%","15%","25%","20%"]
Scavenging is （） of exhaust gases by blowing in fresh air. ["the suction","the compression","the removal","the deliver"]
下列哪个搜索关键词可以更加方便快捷的找到Web迅雷下载软件（）。 ["Web迅雷","Web迅雷下载","下载软件","迅雷"]
产品的A级质量水平指的是（） ["第一级水平","一等品水平","国际级水平","厂一级水平"]
列车调度通信的主要用户包括哪些？
