【单选题】【消耗次数:1】
He was _____ his late twenties when he found his first job.
in
after
after
from
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相关题目
【单选题】 When he came back after an absence of 20 years, he found his hometown completely ____. ?
①  changing ?
②  to be changed ?
③  to change ?
④  changed ?
【单选题】 When we came back, he found his bicycle ____
①  was stolen
②  had stolen
③  had been stolen
④  is stolen
【单选题】 When he came to,he found himself________on a chair,with his hands________back.
①  to sit;tying
②  sitting;tying
③  seating;tied
④  seated;tied
【单选题】 19. When he came to, he found himself _____ on a chair, with his hands _____ back.
①  to sit; tying
②  sitting; tying
③  seating; tied
④  seated; tied
【单选题】 He was totally not aware when the thief _____ his wallet from him.
①  tricked
②  stole
③  robbed
④  deceived
【单选题】 19. He tried to _____ from his memory what he knew of his former neighbor..
①  think of
②  remember
③  summon
④  gave way
【判断题】 He will help his colleage with her job.
①  正确
②  错误
【单选题】 After so many years, he still ____ the hope that his lost son would return one day.
①  clang to
②  clung to
③  inclined to
④  subjected to
【单选题】 When he bent down to tie his shoelace, the belt of his trousers _____.
①  ruined
②  cracked
③  broke
④  split
【单选题】 He found it hard to ( ) his studies in such a noisy environment.
①  devote to
②  dwell on
③  concentrate on
④  depend on
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【单选题】 分析简单电力系统的暂态稳定主要应用()
①  等耗量微增率原则
②  等面积定则
③  小干扰法
④  对称分量法
【单选题】 电力系统中发生概率最多的短路故障是()
①  三相短路
②  两相短路
③  两相短路接地
④  单相接地短路
【单选题】 环网中功率的自然分布是()。
①  与电阻成正比分布
②  与电抗成正比分布
③  与阻抗成正比分布
④  与阻抗成反比分布
【单选题】 电路元件的标么值为()。
①  有名值与基准值之比
②  有名值与额定值之比
③  基准值与有名值之比
④  额定值与有名值之比
【单选题】 设在变压器的某一侧发生短路故障,如果变压器中有零序电流流过,则发生短路一侧变压器的接线方式必须是(   )
①  YN形
②  Y形
③  Δ形
④  开口三角形
【单选题】 电力系统潮流计算主要求取的物理量是(   )
①  电压、功率
②  电压、电流
③  电流、功率
④  阻抗、电流
【单选题】 中性点不接地系统中发生单相接地时,接地点有电流流过,电流的通路是()
①  变压器、输电线
②  发电机
③  输电线、中性点
④  输电线路和线路对地电容
【单选题】 系统发生两相接地短路故障时,复合序网的连接方式为(  )
①  正序、负序、零序并联
②  正序、负序并联、零序网开路
③  正序、零序并联、负序开路
④  零序、负序并联,正序开路
【单选题】 不同类型短路对电力系统并列运行暂态稳定性的影响也不一样,下述说法中正确的是()。
①  三相短路影响最大,以下依次是两相短路、单相接地短路、两相短路接地
②  三相短路影响最大,以下依次是两相短路接地,两相短路、单相接地短路
③  单相接地短路影响最大,以下依次是两相短路、两相短路接地、三相短路
【单选题】 减小输电线路有功损耗可通过()
①  增大线路有功功率
②  增大线路无功功率
③  提高线路两端电压
④  增大输电线路电阻