【单选题】我国国际航空货运单中,航空货运代理人持有( )
【简答题】It's no good __________ remember grammatical rules. You need to practice what you have learned. A. trying to B. try to C. to try to D. that try t0
【单选题】四冲程柴油机工作过程小于180°CA(曲轴转角)的是 。1进气2压缩3膨胀4排气
【简答题】陶渊明《饮酒》中:'采菊东篱下,____________.'