A. excessive piston to liner clearance B. excessive dirt beneath the piston crown that reduces heat transfer C. faulty nozzle spray D. all of the above
A. 凝结 B. 聚集 C. 集合
A. 正确 B. 错误
A. 申请、变更和终止代理关系 B. 买卖委托和撤销委托交易 C. 资金划入和划回 D. 提货申请