使用电话闭塞法行车时，动车组列车占用区间的行车凭证为()。
A. 路票
B. 绿色许可证
C. 调度命令
According to Juliet, the people she meets are
A. rather difficult to please.
B. rude to women drivers.
C. talkative and generous with tips.
D. different in personality.
Which of the following does NOT belong to Trilogy of Desire？
A. The Titan.
B. The Stoic.
C. The Financier.
D. The Genius.
《中国药典》用于检查青霉素聚合物类杂质的方法是
A. 高效液相色谱法
B. 分子排阻色谱法
C. 吸附色谱法
D. 离子交换色谱法
E. 分配色谱法
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