下列传染过程哪种感染类型增多,会造成该疾病的传播流行()
A.病原体被消灭或排出体外
B.潜在性感染
C.隐性感染
D.病原携带状态
E.显性感染
参考答案:D
— I can't believe it! I only got a B on my project.
— That's not a bad grade.
— But I _____ on it for weeks. [ ]
A. am working
B. have worked
C. work
D. worked
最佳手术疗法是:
A.挂线疗法B.切开疗法C.结扎法D.引流法E.切开与挂线结合疗法