选择你所听到的句子。 ( ) 1. A. We have a new classroom. B. We have a new classmate. ( ) 2. A. Her seat is near the door. B. Her seat is near the window. ( ) 3. A. This is my new desk. B. This is my new chair.
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【单选题】Advertising media like newspapers, direct mails and radios ___ to improve sales of industrial products.