Her father works as a ______ in a hotel and her mother a ______ in a private company.

A．cooker, typewriter

B．cook, typist

C．cooker, typist

D．cook, typewriter

患者以高热、淋巴结肿痛、有出血倾向为主诉入院，有鼠接触史。下面关于鼠疫杆菌说法错误的是（）

A.革兰阳性杆菌

B.形态短而粗

C.有荚膜，无鞭毛，无芽孢

D.需氧

E.兼性厌氧