We don't go to work ______ a car _____ a no-car day. [ ]

A: in; in

B: at; on

C: on; on

D: in; on

对金黄色葡萄球菌肺炎最有诊断价值的是（）

A.起病急、病情重

B.血白细胞总数高、核左移

C.喘憋重

D.双肺啰音密集

E.合并脓胸、肺大疱