抽羊水看胎儿成熟度，哪种方法最实用，正确率高
A．肌酐B．L/S比值C．HPLD．E3E．脂肪细胞
参考答案：B
—Would you like another sandwich?
—Another sandwich? I _______ my first one yet.
A．haven’t had
B．hadn’t had
C．didn’t have
D．don’t have
《血证论》所提出的止血、消瘀、补血是通治血证之大纲。
