背景:

某地面施工队伍为满足施工工程的进度问题，安排晚上2点进行露天爆破工作。放炮员叫醒在库房内睡着的库房值班员.取来药后完成了起爆的准备工作。班长为防止路人进入危险区，在路口安设了专人警戒。放炮员发出一声鸣笛信号即起爆，结果有一行人在黑暗中没有看到警戒人员，也没有获得警告通知，走近危险区时被突然的炮声惊吓摔跤受伤，同行的另一行人被飞石打伤。

问题:

1.库房值班人员的错误行为在哪里?

2.分析事故发生的原因及其预防措施。

Due to a constantly (66) environment, a poor understanding of the user’s needs and preferences, as well as a (67) of willingness to modify. (68) organizational structures and decision models, the full economic potential of Web Information Systems (WIS) has not been realized by now. The data object types of the (69) meta model, the Extended World Wide Web Design Technique (eW3DT), provide hypertext designers (70) a conceptual, user-centric framework and graphical notation for the construction of both, (71) and customized models, during the software development (72) of commercial WIS. A reference model as a normative concept represents an abstraction of a (73) company, its functional units, or its Web Information System and is intended to streamline the design and implementation of complex applications at (74) costs. As precondition for pursuing a partial globalization strategy,eW3DT (75) between technical and content-specific responsibilities for designing, implementing, and maintaining WIS.

A．gives

B．distinguishes

C．has

D．difference