0.81,0.64,0.49,0.36______.
0.81,0.64,0.49,0.36______.
组成细胞的基本元素______,______,______,______.
我国的四大牧区是______、______、______、______.
我国的四大高原是:______、______、______、______.
现代生物技术包括______、______、______和______.
我国的四大盆地______、______、______、______.
数据处理的基本过程是______、______、______、______.
腔肠动物的主要特征:______;______;______;______.
125×(4+8)=______×______+______×______.
与我国隔海相望的国家是:______、______、______、______、______、______.
绿色开花植物的六大器官是______、______、______、______、______、______.
填质数:21=______+______=______×______=______-______.