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通过学习《供电技术》，可以获得供配电系统设计的基本知识、工程计算方法和基本实践技能。
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若D1={a1,a2,a3},D2={b1,b2,b3},则D1×D2集合中共有元组在（）个。
Fill in the blanks with the words given below. Change the form where necessary. Each word can be used only once.cradle hesitant militant confer defianceindignation preach provocative milestone overlap1. He could hardly control his ___________ at the conditions under which the miners were forced to work, without water and enough food.2. Both sides were very careful when drafting the ceasefire agreements; they wanted to prevent any actions that could be considered __________ by either side.3. She has always had a(n) _____________ personality; she is always prepared and ready to do battle when she believes that the cause is right.4. News stories _____________: Morning paper headlines take account of the previous evening’s radio and TV stories, and the electronic media pick up items from the daily press.5. Lucy stretched up to kiss her dad’s cheek lightly, and he patted his daughter as if he was _____________ an honor to her.6. Inspired by Martin Luther King’s famous speech, “I have a dream”, thousands of people went out onto the streets to support the civil rights movement in ____________ of the curfew.7. Beth was ____________ about visiting his ex-boy friend; she worried that he might refuse to talk to her.8. When humans first traveled into outer space, it was as revolutionary a(n) ___________ in human culture as the invention of the wheel.9. Perplexed, she turned and noticed her husband had collapsed and was slumped on the floor behind the counter. She rushed to him and ___________ his head in her arms.10. Health experts are now ___________ that even a little exercise, such as doing housework or light gardening, is far better than none at all.
跌磕伤如何处理？
若刺物太短或已全部刺入幼儿的肌肉中，可采取挤压挑拔法将刺清除，最后用（）对伤口进行消毒处理。
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