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【单选题】
关于补体三条激活途径的叙述,下列哪项叙述是错误的A.
三条途径的膜攻击复合物相同
B.
旁路途径在感染后期发挥作用
C.
旁路途径从C3激活开始
D.
经典途径从C1激活开始
E.
MBL 途径中形成的C3转化酶是C4b2a
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举一反三
【单选题】According to the author, ______.
A.
the investigation of the life cycle of a protozoon is undoubtedly pure research
B.
pure scientists tend to look down upon applied investigation
C.
the discover of X-rays was made in applied research
D.
the classification of research into 'pure' and 'applied' is neither accurate nor impersonal
【简答题】A．experiment B．research C．examination D．investigation
【简答题】Your advice that the investigation (be) ______ postponed is reasonable.
【单选题】An important aspect of the preliminary investigation phase is to _______.
A.
prepare a preliminary investigation report
B.
suggest alternative solutions
C.
analyze the data
D.
gather the data
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