A:过滤
B:稀释浓硫酸
C:蒸发
D:测定液体的pH
下列植物的繁殖方式中,属于有性生殖的是( )
Jack is such__________friendly boy. He gets along well with his classmates.
电话铃响,小明拿起一听就知道是爸爸了.小明判断是爸爸发出的声音的依据是( )
补充句子