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【单选题】
下面对51单片机定时器描述正确的是哪一个A.
51单片机有两个8位加法计数器,可以组成16位计数器
B.
51单片机有两个16位减法计数器,可以相互独立工作
C.
51单片机有两个16位加法计数器,可以相互独立工作
D.
51单片机有两个8位减法计数器,可以组成16位计数器。
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