引起病毒性心肌炎的病原体以埃可病毒最为常见。()
参考答案:错
You never know_____happiness will turn up next, so grasp every chance around you. [ ]
A. when
B. where
C. why
D. how
细菌性痢疾的主要病变部位位于()
A.回肠末端
B.乙状结肠与直肠
C.升结肠
D.降结肠
E.累及整个肠道