清热解毒药中，常用治热毒血痢便脓血的药物是
A.蒲公英
B.野菊花
C.紫花地丁
D.连翘
参考答案：A
He opened the envelop, had it_____ and began to read it.
A．unfolding
B．folding
C．unfolded
D．folded
胸部X线摄片的适应证有哪些?
