黄连、黄芩、黄柏并用的方剂是（）
A.凉膈散
B.普济消毒饮
C.清营汤
D.黄连解毒汤
E.龙胆泻肝汤
参考答案：D
For this part, you are allowed thirty minutes to write a letter. Suppose you are Li Ming, write Professor Wang, your former teacher, ask him to write you a letter of recommendation. You should write at least 150 words according to the suggestions given below in Chinese. 1.告诉他你是谁。 2.你请求他做什么以及原因。 3.表示感谢。
在公钥密码体制中，公开的是
A．公钥和私钥
B．公钥和算法
C．明文和密文
D．加密密钥和解密密钥
