西汉和东汉的都城分别是( )
A:殷、洛邑
B:镐京、洛邑
C:咸阳、长安
D:长安、洛阳
设函数 f(x)=|3x+1|−|2x+2| .
计算:
阅读理解
Hello, my name is John. I have PE, art and English on Tuesday(星期二). It's my favourite day. I like English. Look, that is my math teacher. He's very kind. His name is Li Hai. I like beef very much, but I don't like apples. I like bananas, too.