题目内容
整流电路接入电容滤波器后，输出电压的直流成分( )，交流成分( )。
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Listen to a short passage concerning American’s Work Ethic and fill in the missing information.[音频]For four hundred years or more, one thing has been a characteristic of Americans. It is called their “work ethic”. Its 1 were in the teaching of the Christian Puritans who first settled in what is now the northeastern state of Massachusetts. They believed that is was their 2 duty to work as every task to please God by their diligence, honesty, 3_____, skill, and attitude.
在EXCEL中，要选定多个连续工作表，可以_________。
EXCEL窗口底部有一行工作表标签，双击其中某个标签可以__________。
以下操作中，可以挽回刚被误删的一个工作表的是________。
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