患者女性,34岁,妊娠20,现要求终止妊娠。G 2 P 1 ,3年前剖宫产史,1年前人工流产史,安全期避孕。平时月经5/30天,量中。体检T36℃,P72次/分,BP120/80mmHg,心肺无异常。下腹隆起,肝脏肋下未触及,肝区无叩击痛。子宫底平脐,胎心140次/分。B型超声检查示胎儿5.0cm,胎盘位于宫底部。患者肝、肾功能及心电图检查均正常,拟采用吖啶羊膜腔内注射,正确的操作包括()
【单选题】How does E-mail travel on the Internet to reach someone far away? When Jennifer, Who lives in Pasadena, Calif. wants to send an E-mail message from her home computer to her mother in Washington, D. C....