无线城域网使用的无线协议是（）
A.802.3
B.802.6
C.802.11
D.802.16
参考答案：D
以下哪些症状和体征提示内分泌疾病（）。
A.肥胖与消瘦
B.多饮与多尿
C.溢乳和闭经
D.头痛和头晕
E.发热和胸痛
He asked me _____.
A．whether was I born in 1986
B．that I was born in 1986
C．whether I had been born in 1986
D．if I was born in 1986
