痔病保守治方法有（）
A.栓剂
B.针炙
C.熏洗
D.软膏
E.口服药物
参考答案：A, B, C, D, E
.
She is the only one of those women archaeologists who ________ chosen to go to Loulan.
A．has
B．has been
C．have been
D．had been
核酸是一类含磷的______化合物。核酸分为_________(DNA)和__________ (RNA)。
