肾虚火旺证的首选方是（）.
A．杞菊地黄丸
B．知柏八味丸
C．大补阴丸
D．左归丸
E．人参胡桃汤
参考答案：B, C
When people have no will to live, people are often very difficult to help.
A．you are
B．they are
C．it is
D．the other is
血片染好后，冲洗时为什么不能将染色液倒掉再冲洗？
