多项选择题

Wht does Lur suggest tht John do Buy rcer.B．Buy decent bike.C．Buy touring bikWht does Lur suggest tht John do Buy rcer. B．Buy decent bike. C．Buy touring bike. D．Buy second-hnd bike.

A.Buy a racer．
B.Buy a decent bike
C.Buy a touring bike
D.Buy a second-hand bik

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单项选择题

—Do you wnt for your son —Yes, I do.to buyny booksB．buyny booksC．to buy some booksD．buy s—Do you wnt for your son —Yes, I do.to buyny books B．buyny books C．to buy some books D．buy some books

A．to buy any booksB．buy any booksC．to buy some booksD．buy some books

单项选择题

以下关于多媒体文件格式的说法中不正确的是（）

A.WAV为波形声音的文件格式
B.MPEG是一种活动图像文件的压缩标准
C.MP4是MP3的升级版也属于音频文件格式
D.GIF既可以是静止的图像也可以是活动图像文件格式