A Small Question Left Here

When design TextSize,we simply use two ways.

The first is like the following:

android:textSize="45sp"

And the second is like this:

android:textAppearance="?android:textAppearanceLarge"

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BUT what will happen if we use two ways at the same time?

It's here:

AND the result will only be that "45sp" but ignore the last line.

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Well,it's fine,isn't it?