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
A：A
B：B
C：C
D：D
(____)1. Do you like summer?
(____)2. Is it cold in winter?
(____)3. Who's that boy with a big nose?
(____)4. Are they your stickers?
(____)5. Whose coat is that?
A.Yes, they are.
B.He's my friend,Tom.
C.No,I don't.It's too hot.
D.Bobby's.
E.Yes,it is.
下列句子中没有语病的一项是（ ）
