化简16x18x-x212x，得（）A．x3x-x2xB．x2x-22xC．2x2xD．0-数学

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• ----- Hi, Tracy, you look tired. ------ I ________ the living room for three hours.A．paintedB．had pa
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• .--- Have you finished your homework? --- No. I ______ Good Voice of China on Zhejiang TV all day ye