【简答题】回文序列(palindrome sequence)
【多选题】劳动者的以下劳动收入不属于工资范围的是( )。
【简答题】一理想卡诺热机在温度为300K和400K的两个热源之间工作。若把高温热源温度提高100K,则其效率可提高为原来的()倍;若把低温热源温度降低100K,则其逆循环的致冷系数将降低为原来的()倍。
【单选题】After you have done your homework ,____ sure there ar e mo careless mistakes before you hand it in . [ ]
【单选题】以下不属于劳动者工资构成部分的是( )。
【简答题】听力原文:While there are almost as many definitions of history as there are historians, modern practice sees history as the attempt to recreate and explain the significant s of the past. (83)