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电源电动势的方向规定为在电源内部由电位端指向电位端。
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Have you ever used email to apologize to a colleague? Delivered a 1_____ to a subordinate (下属) with a voice-mail message? Flown by plane across the country just to deliver important news in person? The various communication options at our fingertips today can be good for 2____ and productivity—and at the same time very troublesome. With so many ways to communicate, how should a manager choose the one that's best— 3______ when the message to be delivered is bad or unwelcome news for the recipient? We've 4______ business communication consultants and etiquette (礼仪) experts to come up with the following guidelines for 5______ using the alternative ways of delivering difficult messages. First of all, choose how personal you want to be. A face-to-face communication is the most 6______ . Other choices, in descending order of personalization, are: a real-time phone call, a voice-mail message, a handwritten note, a typewritten letter, and the most 7______ is email. Some of these may change order according to the 8______ situation or your own preferences; for example, a handwritten note might seem more personal than voice-mail. How do you decide on the best choice for the difficult message you've got to deliver? “My 9______ concern is: How can I soften or civilize this message?” says etiquette expert Dana Casperson. “So when I apologize, I usually choose in-person first, or a phone conversation as my top alternative, and maybe a handwritten note next. Apologizing by email is something I now totally 10______ .”A) avoid B) convenience C) effectively D) escape E) intimateF) particularly G) primary H) prompt I) reward J)silentK) specific L) surveyed M) unfriendly N) warning O) witnessed
针具的前身或雏形是（）。
以下哪部著作被称为《针经》？
下列哪本著作标志着针灸学理论体系的基本形成？
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