怎样判断相线或N线断线?
参考答案:可用电笔检测单灯的两根引线,如一根有电(相线),一根无电(N线)说明电路正常,如两根均无电,则是相线断,如两根均有电,则N线断。
China is an old country with a ____ history. Li Shizhen is such an ____ man in medicine in ancient China. [ ]
A. 5,000-years, creatived
B. 5,000 years, creating
C. 5,000-year, creative
D. 5,000 year, creatives
宾客点菜时,服务员应面带笑容,上半身略微()倾,身体不能靠在餐桌边,不能把手放在餐桌上,要认真倾听,准确记录,避免出错。
A、前
B、后
C、左
D、右