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【单选题】
在补体激活连锁反应中最终形成的攻膜复合体是A.
C5b6789
B.
C4b2a3b
C.
C4b2b
D.
C3bBb
E.
C3b4b
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】— Excuse me, I want to have a letter mailed, but I can't find a post office. — I know ______ nearby. Come on, I'll show you. [ ]
A.
it
B.
one
C.
that
D.
another
【单选题】—Excuse me. I want to buy some milk, but I can’t find a supermarket. —I know nearby. Come on, I’ll show you.
A.
one
B.
it
C.
that
D.
any
【简答题】使用图层混合模式中的【】模式可以将图像的原有颜色与混合色复合，得到较暗的结果色。
【单选题】Excuse me. I want to book a berth ticket to Xi'an.
A.
I am sorry.
B.
Which day?
C.
Where do you want to go?
D.
What kind of ticket do you want ?
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