整个补体激活过程大致可分为三个阶段，其顺序为
A．激活阶段→识别阶段→膜攻击阶段
B．识别阶段→膜攻击阶段→激活阶段
C．激活阶段→膜攻击阶段→识别阶段
D．识别阶段→激活阶段→膜攻击阶段
E．膜攻击阶段→膜攻击阶段→识别阶段
参考答案：D
解析： 补体活化过程表现为一系列丝氨酸蛋白酶的级联酶解反应。识别后，通过三条激活途径，形成膜攻击复合物，最终导致细胞崩解。
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| What about your future? There are four students who are talking 1 their future. Han Ming: I want to be a pilot when I grow up. So I need good eyesight(视力) and I have to take 2 lessons. I really 3 traveling. Chen Ying: I want to be 4 engineer when I grow up. I'm going to study design and engineering at university. My 5 is to build the longest bridge in the world. Gao Liang: I want to be an actor when I grow up. I'm going to take acting lessons, and 6 singing and dancing lessons, too. I hope I can be 7 one day. Zhang Wei: I want to be a 8 player when I grow up. I know that I have to train hard every day. It isn't 9 , but I will keep on 10 it. I want to be just like my hero, Yao Ming, in the future. | ||||
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