血液中哪种肝炎病毒刺激机体产生的特异性IgG较易消失()
A.甲型肝炎病毒
B.乙型肝炎病毒
C.丙型肝炎病毒
D.丁型肝炎病毒
E.戊型肝炎病毒
参考答案:E
With the popularity of ______ cell phone, more and more people are addicted to it and do less and less face-to-face communication, which has become _______ widespread concern.
A.the; a
B.\; \
C.the; \
D.a; the
蓝细菌(Cyanoobacteria)