小琳为妈妈设计了一份素食早餐:小米粥、煎豆腐、炖黄豆.为使营养搭配更合适,该素食谱中还应该增加( )
A:热豆浆
B:炒青菜
C:烤面包
D:炸油条
4+____=5 5+____=7 ____+1=5
3+____=6 7-____=6 ____-2=3
2+____=7 6+____=7 ____-4=1
He believes that these ____ a common____, an animal that lived in Asia some 300,000 years ago.
下列各组物质的分类正确的是( )