题目

There’s an e___________ amount of information on the Internet. That’s why many people like surfing the Internet. 答案：enormous13．如图所示的各情景中，符合安全用电原则的是（　　）A． 电线上晾衣服B． 用电笔辨别火线C． 电动机外壳不接地D．多用插头可同时供多个大功率电器用电