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色彩深度是指在一个图像中灰度的数量()

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在教学讲演中,教师需要根据教学内容选择恰当的呈现信息的工具,并熟练运用所选工具。A.正确B.错误()

If you compare the quality of our good with that of other country, you will see our price is very reasonable.

We are introducing ourselves as one of the leading exporters of the same line of business.

I am afraid you won’t find another company who will give you a cheaper price than ours.

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