【单选题】【消耗次数:1】
You never told us why you were one hour late for the last meeting, ____?
weren’t you
didn’t you
have you
did you
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相关题目
【单选题】 You must have stayed up late last night, _____?
①  mustn’ t you
②  don’ t you
③  didn’ t you
④  needn’ t you
【单选题】 If you have never planted anything, you won’t be able to know the pleasure of watching the thing you have planted ____.
①  grow
②  to grow
③  growing
④  to be growing
【单选题】 If you have never planted anything, you won’t be able to know the pleasure of watching the thing you have planted _____.
①  grow
②  to grow
③  growing
④  to be growing
【单选题】 Why not buy a cheaper one, ___ you don’t have enough money?
①  since
②  because
③  for
④  though
【单选题】 You ____ that letter to James. However, you didn’t.
①  ought to write
②  ought to have written
③  should write
④  should be writing
【单选题】 6.It was very ______ of you to let us know you were going to be late.
①  considering
②  considerate
③  considerable
④  considered
【单选题】 ——How did you like Nick’s performance last night ?—— To be honest ,his singing didn’t ________to be much?
①  appeal
②  refer
③  belong
④  occur
【单选题】 If you work hard, you will be ________; but if you don’t, you will be punished.
①  relaxed
②  relieved
③  reduced
④  rewarded
【单选题】 You don’t mind ______ you Xiao Li, do you?
①  call
②  to call
③  to calling
④  my calling
【单选题】 You look _______. Did you have a rest all night?
①  tire
②  tired
③  tiring
随机题目
【单选题】 差动变压器属于( )。
①  电感式传感器
②  电容式传感器
③  压电式传感器
④  电阻式传感器
【判断题】 典型的压阻式传感器测量电路是将集成在硅片上的4个等值电阻连成平衡电桥。
①  正确
②  错误
【判断题】 压电式传感器的输出信号很微弱,而且内阻很高,能直接显示和记录。
①  正确
②  错误
【判断题】 磁电式传感器工作性能稳定,输出阻抗小,尺寸和重量比较小。
①  正确
②  错误
【单选题】 下列属于磁电式传感器非线性误差产生原因的是( )。
①  温度变化对传感器产生的影响
②  传感器线圈电流产生的磁通对工作磁通产生的影响
③  传感器所用永久磁铁的磁性逐渐减弱
【单选题】 下列不属于热电偶的基本性质的是( )。
①  涡流效应
②  中间导体定律
③  中间温度定律
④  标注电极定律
【判断题】 电阻应变式传感器结构简单,应用广泛,尤其是测速度,速度传感器中有90%是应变式的。
①  正确
②  错误
【判断题】 具有压电效应的电介质称压电材料,压电材料通常有两类:一类是压电晶体;另一类是经过极化处理的压电陶瓷。前者为单晶体,后者为多晶体。
①  正确
②  错误
【判断题】 压电式传感器的基本原理是以压电材料的压电效应为基础。
①  正确
②  错误
【判断题】 变磁通式传感器,在结构上有开磁路和闭磁路两种,一般用来测量旋转物体的角速度,产生感应电动势的频率作为输出。
①  正确
②  错误