“At lunch time I’d like to have a chat with you.” “Pardon, Have _____ with me?”

A．when

B．who

C．which

D．what

急性肠炎最常见的致病菌（）

A.葡萄球菌

B.链球菌

C.大肠埃希菌

D.沙门菌

E.白色念珠菌