《特种设备安全监察条例》第28条规定，（）的特种设备不允许使用。
A、未经检验
B、检验不合格
C、检验合格
D、申请检验
参考答案：A, B
The children,____ had played the whole day long, were worn out.
A．all of what
B．all of which
C．all of them
D．all of whom
晚期下肢静脉曲张的临床表现主要是（）
A.皮肤厚硬
B.足靴区淤滞性皮炎
C.毛发脱落
D.局部皮肤干燥、瘙痒
E.小腿下1/3皮肤溃疡
