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Section ADirections:In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the center. You may not use any of the words in the bank more than once.Have you ever used email to apologize to a colleague? Delivered a1to 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 2and productivity—and at the same time very troublesome. With so many ways to communicate, how should a manager choose the one that's best— 3when the message to be delivered is bad or unwelcome news for the recipient? We've 4business communication consultants and etiquette (礼仪) experts to come up with the following guidelines for 5using 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 .”

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下列选项中,()不是单稳态电路的特点。

A. 有一个稳定状态,有两个暂稳态。
B. 暂稳态维持一段时间后,将自动返回稳态。
C. 暂稳态时间的长短与触发脉冲无关,仅取决于电路本身的参数。
D. 在外界触发脉冲的作用下,能够由稳态翻转到暂稳态。

若单稳态触发器的稳态为0,那么其暂稳态为()。

A. 1
B. 0
C. 不确定

积分型单稳态触发器必须在脉冲宽度大于输出脉冲时,方能正常工作。

A. 对
B. 错

单稳态电路的暂稳态通常都是靠RC电路的充、放电过程来维持的。根据RC电路的不同接法,可分为微分型和积分型两种。

A. 对
B. 错

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