反映药物影响人体阴阳盛衰倾向的中药性能是（）
A．四气
B．五味
C．归经
D．升降沉浮
E．毒性
参考答案：A
已知a+b=3，ab=2，求下列各式的值：
（1）a2b+ab2；
（2）a2+b2。
Already he had discovered that his brain went beyond Ruth’s, just as it went beyond the brains of her brothers, or the brain of her father.
