【判断题】加热时得到的奥氏体晶粒越粗大则钢冷却下来之后的组织就粗大,钢件的淬火应力也比较大。( )
【单选题】在吉布斯吸附现象中,当表面活度()0,比吸附G()0时,该吸附现象粘为正吸附。
【单选题】When I don't understand the math problem, Tom always helps me with it. He is my walking _________.
【单选题】He always ____ me last term.
【单选题】He always _____me last term.