【单选题】阀门按驱动方式划分,可分为手动阀门、动力驱动阀门和( )。
【单选题】工作介质温度在540—600℃的阀门属于()。
【判断题】“We have great faith and high hopes for her.” This sentence is incoherent because there is a pronoun with ambiguous reference.
【判断题】在阀门操作中,用力越大、阀门越紧,阀门关闭越严。()
【判断题】按介质工作温度分类阀门可分为:普通阀门、高温阀门、耐热阀门。
【判断题】We have great faith and high hopes for her.
【判断题】We have great faith in and high hopes for her.