问题
单项选择题
放电次数较多，放电幅值分散性小，时间间隔均匀。放电的极性效应非常明显，通常仅在工频相位的负半周出现。这更像是特高频检测时哪种局部放电类型的特征（）。
A.自由颗粒放电
B.悬浮电位体放电
C.沿面放电
D.金属尖端放电
答案
参考答案：D
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放电次数较多，放电幅值分散性小，时间间隔均匀。放电的极性效应非常明显，通常仅在工频相位的负半周出现。这更像是特高频检测时哪种局部放电类型的特征（）。
A.自由颗粒放电
B.悬浮电位体放电
C.沿面放电
D.金属尖端放电
参考答案：D
| 补全对话 。 | |
| — Good evening. Grandma's Restaurant. May I help you? — Good evening. 1 — Thank you. May I have your name, Miss? — Mary Brown. — 2 — I'd like to order the "Free Matching Dinner for 2". — Yes, you may choose two soups, two drinks and four main courses from the menu. — 3 — Are you ready? What kind of soup do you want? — Chicken soup and tomato soup. — 4 — I'd like a plate of noodles ,two chicken wings,some beef and a bowl of rice. — 5 — Just a coke and some green tea, please. — May I have your address, please? — Sure, 6A Kingston Court, Belair Cardens, Shatin. — Okay, your food will be delivered in half an hour. Thanks for calling. | |
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