【单选题】【消耗次数:1】
The guard has been asked to_______the door, but so far the door is still closed.
open
opening
be opened
参考答案:
复制
纠错
相关题目
【判断题】 Open the door, please.
①  正确
②  错误
【单选题】 When I opened the door, I saw a girl _________ there.
①  standing
②  stood
【单选题】 After a lot of difficulties, he _______ to open the door.
①  managed
②  succeeded
③  accomplished
④  tried
【单选题】 Zhang Hua opened the door .There______ he had never seen before.
①  did a girl stand
②  stood a girl
③  a girl stood
④  a girl did stand
【单选题】 he park has been built and it will be open _____ three years
①  A. in
②  B.for
③  C.on
④  D.after
【单选题】 Free ______ of shampoo is distributed from door to door.
①  sample
②  example
③  product
④  stock
【单选题】 She was so _____ in her job that she didn’t hear someone knocking at the door.
①  attracted
②  drawn
③  absorbed
④  concentrated
【单选题】 ____ the front door ____, he had to enter the room through the back door.
①  Seen; painted
②  Seeing; painted
③  Being seen; being painted
④  Seeing; being painted
【单选题】 ________the front door________,he had to enter the room through the back door.
①  Seen;painted
②  Seeing;painted
③  Being seen;being painted
④  Seeing;being painted
【单选题】 He has been to Beijing . So [填空] I.
①  have
②  does
③  do
④  did
随机题目
【判断题】 一台变压器原设计的频率为50HZ,现将它接到60HZ的电网上运行,当额定电压不变时,铁芯中的磁通将减少。
①  正确
②  错误
【判断题】 直流发电机中电枢绕组只产生感应电动势,不产生电磁转矩。
①  正确
②  错误
【判断题】 由变压器一相电动势表达式可知,相量落后于相量900
①  正确
②  错误
【判断题】 直流电动机反接制动过程的机械特性一定是一条过原点的直线。
①  正确
②  错误
【判断题】 一台他励直流发电机,当磁极固定,电刷与电枢同时旋转时,电刷两端的电压是直流电压。
①  正确
②  错误
【判断题】 直流发电机电刷位于几何中心线上,若磁路不饱和,这时仅产生交轴电枢反应。
①  正确
②  错误
【判断题】 电机在调速时,静差率越大,相对稳定性越好。
①  正确
②  错误
【判断题】 单相变压器原/副绕组的标志方式不仅与绕组的绕制方式有关,还与绕组的首端A(a)和尾端X()有关。
①  正确
②  错误
【单选题】 关于三相异步电动机转子边产生的磁动势的旋转速度说法正确的是()
①  相对定子边磁动势静止
②  相对定子静止
③  相对转子静止
【单选题】 变压器副边额定电压是变压器原边加额定电压,副边()
①  空载相电压
②  空载线电压
③  额定负载相电压
④  额定负载线电压