单项选择题 关于实验室准入制度，下列说法错误的是：（）。

问答题 What is the correct order of the five steps to an effective contextualisation? (Note: Your answer should follow such a form: ABC..)A. Refer briefly to other scholars who have recently contributed to the field you’re working in.B. Evaluate your primary topic of research by comparing to others like/unlike it.C. Expose how relevant contexts might lead up to how your paper will look at the topic.D. Explain briefly what historical background has shaped the topic you’re discussing.E. Explore how your analysis fits into a larger discussion about your topic in the field.

单项选择题 关于家用电器的说法正确的是（          ） A、金属外壳电器必须接地 B、金属外壳电器有漏电保护就不需要接地了 C、空气开关在漏电时会断开电路保护人体 D、只要接地了，电器就不会漏电，对人就安全了