发现有人触电时，首先要（）电源或用绝缘材料将带电体与触电者分开。
A、闭合
B、切断
C、开关
D、开启
参考答案：B
That________my first visit to Hong Kong,I didn't know where I should go first.There were so many
things to enjoy.[ ]
A. was
B. being
C. to be
D. to have been
重点内容要适当重复，以加强对象的理解和记忆属于（）
A.谈话技巧
B.提问技巧
C.倾听技巧
D.非语言传播技巧
E.反馈技巧
