【简答题】求该周期信号cos(10t)-cos(30t) 的周期().A. π/5 B. π C.2π D.4π
【单选题】----He was nearly drowned once . ---- When was ______? -----_____ was in 2000 _____he was in middle school .
【单选题】He _____ home once a week, but after entering middle school, he _____ home once a month. [ ]
A.
was used to go, was used to go
B.
used to go, was used to go
C.
was used to go, used to
D.
used to go, was used to going
【单选题】周期信号cos(10t)-cos(30t)和ej30t的周期T分别为____和____.
【多选题】患者,男,34岁,足底被绣钉刺伤后8天,出现全身肌肉强直性收缩和阵发性痉挛1天,诊断为破伤风。对于破伤风患者的处理原则以下说法正确的是
B.
避免各类干扰,医护人员说话、走路要低声、轻语
D.
治疗、护理等各项操作尽量集中,避免刺激病人引起抽搐
【简答题】He once worked in a company, ______ he went abroad for further study. A. from which B. after that C. after which D. from this
【单选题】病入,女,20 岁,近 2 年间断出现发作性抽搐 ,未行治疗,今晨洗漱时突然出现意识丧失,全身强直,呼吸暂停,继而四肢发作阵挛性抽搐,尿、便失禁,发作约1分钟后缓解。 对此病人的处理 不包括 :
【简答题】A.Once he wanted to leave without his pants on. B.Once he forgot his wedding and went fishing. C.Once he forgot his lover and married another woman. D.He forgot that he had already man4ed another woma...
【判断题】f(t)=cos(10t)-cos(30t)是为周期信号