A:①是假设,②③是实验事实,④是实验推论
B:①②③④都是实验事实
C:①②是实验事实,③④是实验推论
D:①②③是实验事实,④是实验推论
器官是由不同的组织按照一定的次序结合而成.以下属于器官的是
选择句子补全对话。
A. Is it green? B. What do you see? C. What colouris it? D. Good morning, Alice.
Danny: ____
Alice: Good morning, Danny.
Alice: I see a bird.
Alice: No, it isn't.
Alice: It's red.