[单项选择]销售与应收子系统中使用的库存产品代码（）.
A. 不允许在销售系统中进行设置
B. 两组代码互不相关
C. 必须与库存管理子系统中的代码保持一致
D. 两组代码是不相同的概念

[单选题]在试验和推广新技术、新工艺、新设备、新材料的同时，应制定相应的（ ），经本单位批准后执行。
A.A.安全措施
B.B.技术措施
C.C.组织措施

[单项选择]属于限制进口的贸易保护政策手段是( )。
A. 出口补贴
B. 低价销售
C. 出口退税
D. 关税配额

[单项选择]在交流船舶电站的控制屏面板上，设有原动机的调速手柄。标有“快”（或“正转”）及“慢”（或“反转”）两个方向。意思是当手柄向“慢”方向操作时，（）。
A. 调速器的弹簧预紧力增加，油门开度增大
B. 调速器的弹簧预紧力增加，油门开度减小
C. 调速器的弹簧预紧力减小，油门开度增大
D. 调速器的弹簧预紧力减小，油门开度减小

[多选题]对（）等铁路局无法建立计量标准的量具，应送所在地市有相应资质的技术机构进行检定或校准。
A.GPS定位仪
B.全站仪
C.水准仪
D.道尺

[单项选择]包括参数估计和假设检验在内的，由样本数据的特征总体特征的方法属于下列哪一项（）
A. 统计设计
B. 数据整理
C. 统计描述
D. 统计推断
E. 统计发布

[判断题]试验列车自动制动机缓解的手信号夜间为白色灯光在下部左右小动。
A.正确
B.错误

[名词解释]案头调查法

[判断题]在使用风机进行强制通风时，必须确认有限空间是否处于易燃易爆环境中，若检测结果显示处于易燃易爆环境中，必须使用防爆型风机，否则，易发生燃爆事故。
A.正确
B.错误

[简答题]

In the past year, a lot has changed in the field of human spaceflight. (46) In January, President George Bush brushed aside the fact that America’s entire space-shuttle fleet was grounded when he announced grandiose plans to put people back on the moon, and then to launch a manned mission to Mars. (47) In June, Butt Rutan, an American aeronautical engineer, showed that human spaceflight was no longer the preserve of governments by sending a man to the edge of space in Space Ship One, a privately financed vehicle that cost about the same to build as a luxury yacht. That was followed in September by Sir Richard Branson, the British entrepreneur behind the Virgin brand, announcing that he had signed a deal with Mr Rutan to work on plans for a fleet of five suborbital vehicles developed from Space Ship One.
(48) Now, in the dying days of the year, America’s Congress has passed a bill that unravels a tangle about who would be responsible for regula