【单选题】【消耗次数:1】
—I’m sorry to keep you waiting. —Oh, not at all. I___ here only a few minutes.
have been
had been
was
will be
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相关题目
【单选题】 -- Sorry I kept you waiting.
①  I’m sad
②  I don’t care
③  That’s all right. There’s no hurry
④  No, not at all
【单选题】 A: How long have you been here?B: Not for long, only about five minutes. Alice and Monica ______ here with me.
①  have walked
②  had walked
③  were walking
④  walked
【单选题】 A: Im sorry to have kept you waiting. B: [填空].
①  It doesnt matter
②  Dont mind
③  My pleasure
④  Youre welcome
【判断题】 A: Sorry, Mr. Thomas left here just a few minutes ago. B: May I take a message?
①  正确
②  错误
【单选题】 I came to?Beijing?in 1991 and have been ?[填空] here ever since.
①  live
②  lives
③  lived
④  living
【单选题】 -I’m sorry I broke your mirror.-Oh, really? ____.
①  It’s OK with me
②  It doesnt matter
③  Don’t be sorry
④  I don’t care
【判断题】 A: Have you been wasting time on computer games again? B: Not really. I’ve been studying a lot and I need a break.
①  正确
②  错误
【单选题】 Oh, I’m sorry. But I promise I’ll be careful next time.
①  It’s nothing at all
②  Oh, never min
③  It doesn’t matter
④  Thank you
⑤  There are no questions
【单选题】 I hope ___ the little ___ I have been able to do has been of some use.
①  that; that
②  /; by which?
③  what; what
④  /; with which
【单选题】 How stupid I have been! Why _______ I do that before?
①  don’t
②  didn’t
③  not
随机题目
【判断题】 低通滤波器是用来通过高频信号,抑制或衰减低频信号的滤波电路。
①  正确
②  错误
【判断题】 传感器和测试技术是多门学科交叉,包括自动控制技术、微电子技术、通信技术、计算机科学和物理学等。
①  正确
②  错误
【判断题】 交流电桥只适合于静态测量。
①  正确
②  错误
【判断题】 高通滤波器允许低频信号通过,抑制或减弱高频信号。
①  正确
②  错误
【单选题】 滤波器的截止频率定义为频率下降( )那一点所对应的频率。
①  2Db
②  3Db
③  4Db
④  5Db
【单选题】 在二阶压控电压源电路的五个无源元件中,至少有( )个必须是电容。
①  1
②  2
③  3
④  4
【单选题】 允许低于某一频率的信号通过的滤波器是( )。
①  高通滤波器
②  带通滤波器
③  低通滤波器
【单选题】 量程或测量范围、过载能力等属于( )。
①  可靠性指标
②  输入量的性能指标
③  静态特性指标
④  环境要求指标
【单选题】 不允许信号通过的频段为滤波器的( )。
①  阻带
②  通带
③  过渡带
【简答题】 简答我国古代职官制度发展的三个时期及发展特点。