【判断题】【消耗次数：1】
8255A工作在方式2时，允许数据双向传送。
①
正确
②
错误
参考答案：
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相关题目
【简答题】
8255A的工作方式有方式0功能为[填空1], 方式1功能为[填空2], 方式2功能为[填空3]。
【单选题】
8255工作在方式0时，下面哪种说法正确（???）????
①
A、B、C三个口输入均有锁存能力?
②
只有A口输入有锁存能力
③
只有C口输入有锁存能力
④
A、B、C三个口输入均无锁存能力
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( ) relationships in happy families can create much pleasure.
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Principal
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Intimate
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Mythical
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Replaceable
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They had been married for a long time but gradually ( ) until they separated.
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drifted into
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drifted apart
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drifted along
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drifted about
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far from
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far away
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beyond
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further from
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identity
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solitude
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flowers
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stems
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The young man ( ) the food within a well-sealed container.
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attracted
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replaced
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exchange
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replace
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motion
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