【单选题】听力原文:M: Next, please. W: Yes, how much does a ticket to New York cost? M: $ 30.50. W: That's really expensive. Are there any other trains going to New York? M: Well, there's the late train that arrive...
【单选题】链条中宜尽量避免使用过渡链节,这主要是因为( )。
【简答题】Preview unit 2 (章节2.2.1 and 2.2.5)Please list the words that are new for you.
【单选题】听力原文:M: Next.please. W: Yes,how much does a ticket to New York cost? M: $30.50. W: That’s really expensive.Are there any other trains going to New York? M: Well,there’s the late train that arrives in ...
【单选题】链条中宜尽量避免使用过渡链节,这主要是因为( )
【判断题】链条中宜尽量避免使用过渡链节,这主要是因为过渡链节的链板要承受附加弯矩作用。
【简答题】please preview the new words of this task and match the words with their correct meanings.
【单选题】链条中宜尽量避免使用过渡链节,这主要是因为 ( ) 。
【单选题】"废除地主阶级封建剥削的土地所有 制,实行农民的的土地所有制,借以解放农 村生产力,发展农业生产......”以上条文引自()