计算(aa-b－ba-b)÷1a+b的结果是( )．

题干

计算(

a

-

b

－

b

a

-

b

)÷

1

a

+

b

的结果是( )．

A：a－b

B：a＋b

C：a

D：a²－b²

上一题下一题 0.0难度选择题更新时间:2016-08-16 01:45:50

B

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B

Amy	I like singing. I can play the guitar and the piano. I want to join the music club.
Bill	Do you want to know my favorite sport? I like playing basketball very much. I can playing it well.
Jackie	I like playing the piano very much. I often play the piano after school.
Frank	My favorite sport is playing soccer, and I’m good at it.