如下图所示的单杆活塞缸,当有杆腔进油,工作台右移时,速度为V1,推力为F1;当无杆腔进油,工作台左移
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听力原文:M: Did the party come off last night ? W: Yes, but many didn’t show up. Q: What d
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By saying that "in too many academic fields, the work has no context" (Para. l) the author