为什么IP地址的主机地址部分不能全为1？
参考答案：
IP地址的主机地址部分全为1即十进制数255，被用作广播地址。
A client in her 36th week of pregnancy is admitted to the hospital with vaginal bleeding. After undergoing an ultrasonic scan, she's diagnosed with placenta previa. Which assessment finding would best confirm this diagnosis ？（）
A．A rigid abdomen.
B．A soft, nontender uterus.
C．Painful vaginal bleeding.
D．Hypotension.
积温
