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时，使用8259A的CS2~CS0引脚。

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8259有两种中断触发方式和。

Your house isn't far from here, ______?

A. isn't it
B. aren't they
C. is it

She never takes the bus to college, _____?

A. does she
B. doesn't she
C. did she

You're a doctor, _____?

A. are you
B. aren't you
C. would you