【单选题】听力原文:M: I'm so tired that I can't see straight. W: You've been tired a lot lately, haven't you? M: Well, for the last few weeks, I've had to stay up most the nights to observe star configurations for ...
【单选题】电气化铁路线路日常拨道,线路中心位移不得超过( )。
【单选题】电气化铁路线路拨道,线路中心位移不得超过()mm;一侧拨道量年度累计不得大于120mm,并不得侵入限界(中级线路工用)。
【判断题】客户关系生命周期管理的目的主要是根据不同的客户不同的生命阶段合理配置企业资源。
【单选题】听力原文:M: What trouble are you having with your eyes? W: Well, I'm a bit tired and you know I do a lot of reading because of my work and besides our room is in the basement in the Department of English ...
A.
She has a lot of reading assignment.
B.
Her room is not well lit.
C.
The English Department is in a basement.
D.
She lives in a basement and works hard.
【单选题】电气化铁路线路拨道,线路中心位移不得超过( )mm;一侧拨道量年度累计不得大于120mm,并不得侵入限界。
【多选题】下列有关共轭体系的形成对紫外吸收光谱的影响的叙述正确的是:
A.
共轭体系中分子的 HOMO 轨道能级降低, LUMO 轨道能级升高,使 p → p * 跃迁能量降低
B.
共轭体系中分子的 HOMO 轨道能级升高, LUMO 轨道能级降低,使 p → p * 跃迁能量降低
D.
成键电子离域倾向增大,扩大共轭范围,更容易发生跃迁
【判断题】客户关系生命周期管理的目的主要是根据不同的客户不同命阶段合理配置企业资源。