下列哪一项不属于与病毒增殖有关的异常现象( )
A．顿挫感染 B．缺陷病毒的形成C．干扰现象 D．持续性感染
参考答案：D
—It sounds as if he knows a lot about computers.
—He is a person who is fond of ________. [ ]
A. showing up
B. making up
C. showing off
D. making out
转氨酶的辅酶是
A．四氢叶酸
B．泛酸
C．生物素
D．磷酸吡哆醛
E．焦磷酸硫胺素
