Latency is an outcome particularly characteristic of which one of the following virus groups?
A. Polioviruses
B. Herpes viruses
C. Rhinoviruses
D. Influenza viruses
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Which one of the following virus can cause vertical transmission?
A. HAV
B. CMV
C. Influenza virus
D. Rabies virus
E. Japanese B encephalitis virus
食品营养学中,根据蛋白质营养价值的高低,可将蛋白质分为()()()三类。
根据机体氨基酸的来源,营养学上可将氨基酸分为()、()和条件必需氨基酸,条件必需氨基酸指()和()。
测得某一样品中氮的含量为6克,则该样品中蛋白质的含量为()克。