[填空题]采用通道这种I/O结构的最大优点是可以实现（）和（）并行工作。

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• ●    采用通道这种I/O结构的最大优点是可以实现（）和（）并行工作。
• ●    All people, whether they be rich or poor, trong or weak, privileged or deprived，are interdependent, and _______ the common tak of eeking to achieve mankind full potential
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