感染谱
参考答案:
是指当机体感染了不同病原体后,经过传染过程,其感染者轻重程度会表现出很大差异。有些表现以典型症状为主,而有些则以隐性感染为主。
Some teenagers don’t like to talk with their parents, but I am ______ them. I love to talk with my parents.
A.the same as
B.different from
C.pleased with
D.interested in
观察20例麻疹疫苗接种后的抗体平均增加水平,宜用哪个公式()
A.
B.
C.
D.
E.