（）分为变量消费单元的店内码和定量消费单元的店内码。 ["厂家条码","店内码","商品代码","商品目录"]
The term flood current refers to that time when the water（）. ["is flowing towards the land","is moving towards the ocean","level is not changing","level is rising because of heavy rai"]
转动机械在检修前均应先作好（）措施。 ["停运","停电","取下防护罩"]
建行证券业务系统的投资人帐户结构分为（） ["A.两层","B.三层","C.四层","D.五层"]
发生炉煤气和水煤气这两种煤气（）单独作为城市燃气的气源。 ["适宜","不适宜","严禁","经常"]
出灰转盘出轨道的原因及处理方法是什么？
