【单选题】The airline companies say that they have raised the lost-ticket replacement price in order to______.
A.
attract travelers to take ticketless flights
B.
punish those who insist on using paper tickets
C.
do better than other airline companies
D.
pay for the work to deal with lost tickets
【简答题】作业1.pdf 作业完成和提交说明(重要).docx 3月2日 作业1中,1-2,1-5 3月5日作业1中,1-7,1-8 3月12日作业1中,1-13,1-16,1-17
【多选题】下表给出了 5 项作业在两个加工中心加工的时间,按照 Johnson 准则,最优方案包括( )。 加工中心 作业 作业 1 ( J 1 ) 作业 2 ( J 2 ) 作业 3 ( J 3 ) 作业 4 ( J 4 ) 作业 5 ( J 5 ) I 5 6 7 5 3 II 2 8 2 4 4
A.
J 5 → J 2 → J 4 → J 3 → J 1
B.
J 1 → J 2 → J 4 → J 3 → J 1
C.
J 5 → J 2 → J 4 → J 1 → J 3
D.
J 5 → J 4 → J 2 → J 3 → J 1
【简答题】请将下列化合物的紫外吸收波长 l max 值按由长波到短波排列 , 并解释原因。 (1) CH 2 =CHCH 2 CH=CHNH 2 (2) CH 3 CH=CHCH=CHNH 2 (3) CH 3 CH 2 CH 2 CH 2 CH 2 NH 2
【单选题】When you want to cancel your ticket booked earlier, the clerk of the airline company will ask you the following information except _______________.
A.
paper airline ticket or e-ticket
B.
name and your flight information