机车牵引电机的供电方式可分为集中供电、半集中供电及（）等方式。
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LKJ2000数字量输入/输出插件板1B灯“亮”表示含义是（）。
A. 接收机车工况向后位（XH）信号
B. 接收机车工况向前位（XQ）信号
C. 接收机车工况牵引位（QY）信号
D. 接收机车工况制动位（ZD）信号
下列企业发展评价指标中，（）在小企业发展过程中呈较快增加的趋势
A. 员工数量
B. 销售额
C. 资产规模
D. 进入障碍
E. 竞争能力
You executed the following command in Recovery Manager （RMAN）： RMAN> REPORT NEED BACKUP days 3； What is the output of this command？（）
A. a list of files that require a backup within three days
B. a list of files requiring more than 3 days of archive logs to apply
C. a list of files that RMAN recommends be backed up only once in every three days，based on low volatility
D. a list of files for which a backup has already been performed in the last three days and which is required to be backed up again based on the high number of transactions performed on them
关于个人结售汇年度总额，下列说法错误的是（）
A. 境内个人结汇年度总额为等值5万美元
B. 境内个人购汇年度总额为等值5万美元
C. 境外个人结汇年度总额为等值5万美元
D. 境外个人购汇年度总额为等值5万美元
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