问题
单项选择题
Ⅰ类电动工具的电源必须采用三芯或四芯的多股铜芯橡皮软电缆或护套软线，其中绿/黄双色线在任何情况下只能作（）
A、相线（火线）
B、工作零线
C、相线或零线均可
D、保护接地或接零线
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
Ⅰ类电动工具的电源必须采用三芯或四芯的多股铜芯橡皮软电缆或护套软线，其中绿/黄双色线在任何情况下只能作（）
A、相线（火线）
B、工作零线
C、相线或零线均可
D、保护接地或接零线
参考答案：D
| 完形填空 | ||||
| For 52 years my father got up every morning at 5?30 a. m., except Sunday, and went to work.I__1__ saw my father home from work ill.He had no hobbies, __2__taking care of his family. For 22 years, __3__I left home for college, my father__4__me every Sunday at 9?00 a. m..He was always interested in my__5__, or how my family was doing, and I never once heard him__6__about his lot (生活状况) in life.The calls even came when he and my mother were in other states. Nine years ago when I__7__my first house, my father,67 years old, spent three days__8__my house. He would not__9__me to pay someone to have it done.All he __10__was a cup of tea, a paint brush and to talk to him.But I was too__11__.I had a law practice to run, and I could not take__12__to hold the brush, or talk to my father.__13__things hap  pened several times later.The morning on Sunday.January 16,1996, my father telephoned me__14__, this time from my sister's home in Florida.But the__15__came again at 4?40 p. m.that day.My father was in the__16__in Fl  orida with an aneurysm (动脉瘤). I got on an airplane__17__, and on the way, I__18__of all the times I had not taken the time to talk to my father.I determined that when I arrived, I would__19__for the lost time, and have a nice long talk with him. I arrived in Florida at 11?30 p. m., my father had__20__at 9?12 p. m..This time it was he who did not have time to talk, or to wait for me. | ||||
|
