每年农历四月二十八为（）山药王庙会。
A.丹东凤凰山
B.鞍山千山
C.锦州医巫闾山
D.本溪九顶铁刹山
参考答案：A
There are several factors _______ in the economy _______ make it difficult to predict the future.
A．operate; where
B．operating; which
C．to operate; that
D．operated; what
试述外伤性头皮血肿的类型、特点及治疗方法。
