【单选题】1mol/L HAc溶液中HAc的α=1.33%,则[H ]为多少mol/L
【简答题】《物流系统规划与设计》学期性作业(2017).doc
【单选题】—— Why? Tom, your shirt is so dirty! —— Mum, I _____ my storeroom downstairs。
【单选题】积极进取就是要不懈不特,追求发展,( )。
【简答题】《物流系统规划与设计》学期性作业(2016).doc
【单选题】—Tom, go and join your mother in cleaning the room. —Why ______ ? Jenny is sitting there doing nothing.