目的：探讨双胎儿童的产次、出生体重与脑瘫发病率之间的关系。
Objective: To explore the relationship between cerebral palsy and the parity, birth weight in twins.
四氢萘加氢裂化反应的关键步骤和双环化合物裂解的转化率以及单环化合物的产率与两种催化剂担体的酸性及反应温度有关。
The key steps of hydrocracking of tetralin, the conversion of double ring compounds and the yields of mono-ring compounds were affected by the reaction temperature and the acidity of two catalysts.
结果双胎妊娠妊娠期、产时和产后并发症多于单胎妊娠，胎位是决定分娩方式的主要因素。
Results Twin pregnancy had more complications than singleton during in labor and puerperuim Conclusions Antenatal care should be enhanced in twin pregnancy.
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