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【简答题】
机体的免疫功能包括 , 和 。 机体识别并清除外来病原体的功能称为 。
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【简答题】Questions 18~21 are based on the following dialogue between a customer and a shop assistant. 第18题：
【简答题】下列物品可以在哪个商店买到？请选出来。 ( ) 1. A. tea shop ( ) 2. B. bicycle shop ( ) 3. C. clothes shop ( ) 4. D. book shop
【简答题】Questions 18～21 are based on the following dialogue between a customer and a shop assistant. 第 18 题 What does the woman want to buy?
【简答题】Questions 18~21 are based on the following dialogue between a customer and a shop assistant. 第18题：
【简答题】Questions 18～21 are based on the following dialogue between a customer and a shop assistant. What does the woman want to buy? [A] A sweater. [B] An expensive pen. [C] A microwave oven. [D] A dishwashe...
【简答题】根据你所听到的回答 6～10 ： 第 6 题 A) A company manager. B) A waitress. C) A shop assistant. D) A secretary.
【简答题】Questions 18~21 are based on the following dialogue between a customer and a shop assistant. 第18题：
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