读句子，将问句和答句连线。
①Whose dress is it? ____ A. It's pink.
②What colour is the shirt? ____ B. It's under the sofa.
③Is this your shirt, Dad? ____ C. No, it isn't.
④Where's my hat? ____ D. It's my sister's.
–I hear your dad _____Shanghai on business. Did he fly there? –Yes, but he will be home tomorrow.
实例或现象
解释或描述
A
镰刀型细胞贫血症引发的贫血
铁是构成血红蛋白的主要元素，所以是缺铁所致
B
农田施肥过多，造成烧苗现象
外界溶液浓度过高，植物过多失水
C
细胞癌变
细胞膜糖蛋白增多，染色质收缩，细胞周期变长
D
无子番茄的培育
原理是生长素促进果实的发育
