The study of NMR showed that every block of polymer I has alternating structure.
NMR研究表明该嵌段聚合物各段都具有交替结构。
Objective To explore electrocardiogram feature of non-alternating Wenchebach atrioventricular double layer block and it's clinical significance.
目的探讨表现为非交替性文氏周期的房室交接区双层阻滞的心电图特点和临床意义。
Objective To explore electrocardiogram feature of non-alternating Wenchebach atrioventricular double layer block and it's clinical significance.
目的探讨表现为非交替性文氏周期的房室交接区双层阻滞的心电图特点和临床意义。
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