【简答题】对于链速v<0.6m/s的低速链传动,因其主要失效形式是链条的______,故应按______强度条件进行计算。
【单选题】任何一个有彩色系的色彩加白、加灰、加黑都会降低它的
【单选题】Why is the narrator of “Araby” anxious for his uncle's return?
A.
The uncle says he has a surprise for him.
B.
He needs money from his uncle.
C.
The uncle has a message from Mangan's sister.
D.
The uncle has a secret to reveal.
【单选题】对于v<0.6m /s的低速链传动,其主要失效是拉断,所以应进行()校核。
【简答题】任何一个有彩色系的色彩加白、加灰、加黑都会降低它的 。
【单选题】— Did Tom go to his uncle's? — _____ — I asked whether Tom went to his uncle's. [ ]
【简答题】Rose is his c______. She is his uncle’s daughter.