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【多选题】
NK细胞自然杀伤靶细胞的特点是A.
不需要抗原剌激
B.
识别靶细胞不受MHC Ⅱ类分子限制
C.
靶细胞表面MHC I 类分子表达减弱时，NK细胞杀伤能力增强
D.
穿孔素导致靶细胞溶解
E.
具有ADCC
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反馈参考答案：
举一反三
【简答题】Task 2 Read the passage. Choose the best answer to each question. In England, most people live in areas. More and more families would rather have their own house than rent one. When buying their...
【简答题】求前束范式: $ x
(┐( $ yP(x,y)→( $ zQ(z)→R(x))))
【简答题】A house agent is showing a couple around a flat which they probably will rent. Below is a list of furniture items. Listen to the conversation and fill in suitable numbers in the plane figure of the fl...
【单选题】建筑生石灰、建筑生石灰粉、建筑熟熟石灰粉按有效(cao+mgo)的含量,可分为()、()和()三个等级。
A.
优等品，一等品，合格品
B.
一等品，二等品，三等品
C.
合格品，不合格品
【简答题】Task 2 Read the passage. Choose the best answer to each question. In England, most people live in areas. More and more families would rather have their own house than rent one. When buying their...
【简答题】Task 1 Read the passage. Choose the best answer to each question. In England, most people live in areas. More and more families would rather have their own house than rent one. When buying their...
【简答题】原电池的电解池在结构和原理上各有何特点?各举一例说明(从电极名称、电极反应、电子流动方向等方面进行比较)。
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