It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any __________.

A．symptom

B．sense

C．sample

D．shadow

对衣原体原体描述，错误的是（）

A.有胞壁

B.胞浆内含致密的物质

C.成熟的衣原体

D.有高度的感染性

E.衣原体发育周期中的繁殖型