问题
填空题
计数器是一种能够记录()的装置。
答案
参考答案:脉冲数目
计数器是一种能够记录()的装置。
参考答案:脉冲数目
根据对话内容,从方框内选择恰当的句子填入对话相应的空白处,使对话完整,合乎情景(有两个多余选项)。 A:Hello,Mike! What's the time? B:(1) ______________________________ A:Where’s Bob? I can't find him. B:I don't think he can come. A:(2) ______________________________ B:He has to look after his sister. A:(3) ______________________________ B:She doesn't feel well. A:(4) ______________________________Did she go to see the doctor? B:Yes. A:(5) ______________________________ B:The doctor said nothing serious,but she has to rest.
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