补全下列对话: Betty: Do you often _________ the cinema, John? John: Yes, I go to see a film every week. Betty: What ______ of films do you like best? John: I like action films. What ______ you? Betty: I really like cartoons.
【简答题】在减压回路中,减压阀调定压力为 p j ,溢流阀调定压力为 p y ,主油路暂不工作,二次回路的负载压力为 p L 。若 p y > p j > p L ,减压阀进、出口压力关系为( );若 p y > p L > p j ,减压阀进、出口压力关系为( )。 ( A )进口压力 p 1 = p y , 出口压力 p 2 = p j ( B )进口压力 p 1 = p y , 出口压力 p 2 = ...