A:①②和①③
B:②③和①②
C:②④和①③
D:②③和③④
材料分析题
The lake near our village is _______. It's dangerous to swim in it.
学习了密度知识后,小明对一个鸡蛋的体积进行了估算(鸡蛋密度与水相近),下列估算值最接近实际的是( )