Mrs Johnson said, "I drew the picture last week."

Mrs Johnson said that ________ the picture _________. [ ]

A. she drew; the week before

B. I had drawn; that week

C. she had drawn; the week before

D. I drew; the last week

下列关于沙门菌食物中毒的描述，错误的是（）

A.病原体存在于猪、牛等的肠腔、内脏和肌肉中

B.传染源为被感染的动物和人

C.患者由于带菌时间短，不是主要的传染源

D.多发生于夏秋季

E.感染后可获得较持久的免疫力