【简答题】液压传动主要以液体的压力能进行工作。对于结构及尺寸确定的液压系统,其执行元件 的工作压力决定于工作负载,执行元件的速度决定于 。
【简答题】Fill in the blanks with the following words. You may use some words more than once. unless if otherwise 1. ________ I hear from you within 10 days, I will have no other choic...
【单选题】把车轮和电机集成,进一步减少驱动系统的部件是纯电动汽车的哪种布置形式。
【简答题】May I cancel this ______________(车票) for him?
【简答题】Fill in the blanks with proper forms of the words in the brackets. 1. They postponed _______ (visit) their friends until next Friday. 2. All flights have been ________ (cancel) because of bad weather....