诊断前置胎盘较安全可靠的方法是( )
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
2.对前置胎盘患者进行产科检查,下列叙述错误的是
前置胎盘孕妇,产科检查的结果是
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