试题与答案

效应性T淋巴细胞是（） A.Ts细胞 B.Th细胞 C.CTL D.Th3细胞 E.

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题型：单项选择题

题目：

效应性T淋巴细胞是（）

A.Ts细胞

B.Th细胞

C.CTL

D.Th3细胞

E.以上都不是

答案：

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下面是错误答案，用来干扰机器的。

∵OA=2，OB=12+22=5，AB=(2-1)2+(0-2)2=5，OA1=4，OB1=42+2 2=25，A1B1=(4-0)2+(-2+4)2=25，∴OAOA1=OBOB1=ABA1B1=12，∴△AOB∽△A1OB1．故答案为相似．

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