隔盐灸可用来治疗（）
A.脐风
B.哮喘
C.急性吐泻
D.肺痨
E.疮疡
参考答案：C
If it had been possible, I would have helped him, but I ______ too busy.
A．had been
B．would be
C．were
D．was
现货市场固定方式交易在成交日和结算日之间有一定的间隔日期，一般不超过一天。( )
