公称容积40L的气瓶，单环宽度为（）mm，双环的各环宽度为（）mm。 ["30、30","40、30","40、40"]
tommy has created a sales view in his sales.nsf database. Tommy wants negative numbers in the sales number column in the view parenthesis. which one of the following should tommy do?（） ["select the parenthesis when negative value in the view properties box ","select the parenthesis when negative value in the column properties box ","use the @function @negative to set this in the column formula in the view ","use a formula to format the value in the field on the form that will be displaying in the view"]
设备重量均以设备的铭牌重量为准；如无铭牌重量的，则以产品目录.样本.说明书所注的设备（）为准。 ["净重量","毛重","运输重量","带支架重量"]
新形势下电信业务的丰富带来分类方式的多样性，按信息感官可将电信业务分为（）。 ["固定业务和移动业务","话音业务和非话业务","宽带业务和窄带业务","图文业务和视像业务"]
磁带格式 TS1130 和 LTO 哪种是开放技术的？（） ["TS1130","LTO","两个都是","两个都不是"]
何谓菜单，菜单的功能有哪些？
