what es black?ls that a board?

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what es black?ls that a board?

what es black?ls that a board?
what es black?ls that a board?

what es black?ls that a board?
what es（is) black?ls that a board?
什么东西是黑色的,是一块木板吗?
——blackboard黑板

黑色的是什么？是一个板？