过敏性紫癜哪种类型最常见（）
A.皮肤型
B.肾型
C.关节型
D.腹型
E.中枢神经系统受累
参考答案：A
--- This is ___________ film I’ve told you about several times.
--- It’s great. I’ve never seen _________ more moving one.
A．a; an
B．the; an
C．the; a
D．a; a
炼钢对废钢的要求主要有哪些？
