除身体虚弱化源不足外，引起产后妇女缺乳的还有
A．瘀血内阻B．脾气下陷C．痰湿阻滞D．心血亏虚E．肝郁气滞
参考答案：E
Lucy is not _____ good at sports _____ Kate.[ ]
A. much, than
B. very, as
C. so, as
D. as, so
简述热电偶“中间导体”定律？
