题目

 情景交际。用句子补全对话。 A: Hello, Mrs. Zhang. What are you going to do? B: I have finished my work.  1  . A: Would you like to go shopping with me? B:   2  . A: You know, my parents love Tang costumes very much. I want to buy some for them.B: I hear there is going to be a fashion show in the shopping center.   3  ? A: Good idea!  4  ? B: Let’s make it 9:30. A: By the way,   5  ? B: They are made of silk. A: I see. OK. See you tomorrow. B: See you. 下列过程不需要对母本去雄处理的是 ①用杂合抗病小麦连续自交得到纯合抗病植株； ②对抗病小麦植株的测交； ③用四倍体西瓜和二倍体西瓜杂交得到三倍体无籽西瓜种子； ④对三倍体无籽西瓜授以二倍体西瓜花粉，结出无籽西瓜。 [　　] A． ①②③ B． ②③④ C． ①④ D． ②④