关于霍乱弧菌的生物学性状,错误的描述是（）

A．增菌培养基通常为碱性蛋白胨水

B．有菌毛和单鞭毛

C．悬滴观察呈“穿梭”样运动

D．EI-Tor生物型可形成芽胞

E．革兰染色为阴性

—Can you tell me ______ this CD player?

—Sure. First you have to turn it on. Just press the first button. [ ]

A. how to use

B. when to buy

C. where to repair