A:I go to school by bike.
B:I go to the library by bike.
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珠江三角洲地区能吸引大量民工到来的最主要原因是( )
These are my hand.
____应改为____
君臣礼仪是中国古代政治制度发展的外在表现。三幅图的变化反映的实质是( )