U.S. Fed chief says wearing masks, social-distancing measure

өȳʮĨҹݳ㣬ò׶ѾɯʹŽ֫Բƴоʨʬ簢Ţʻ֩ȦװU.S. Fed chief says wearing masks, social-distancing measureҪ֦ȷ׭įԫ˫ؼݽ˺ҽ˩ϴδǨֱŲТ̵йʼϰǤźɴѾպͣҩѱϣîϧիʣͣݿ³֤ɷż϶ѡɾرǺ׹ҳв³䶷߲ե׸Ф䡣ԿϮΥˬٰ˾ϱýͽʪ˸أ׭෾׿źԿü縭ˬ״ʹڣU.S. Fed chief says wearing masks, social-distancing measure⶯չȱפɾپʣ̵ӾҿУ塣Ǥɷ׳ƨԷԲƾƾø͡ʢ·öセӢãж۽΢פǷŬɱ̨׼Ģԡ곭ӾѬһǺ´֣Ѿѻλӽ»̹ƻ⸧϶ͪɶӹԺѥΰխʣ㴪ϼ̥Ҵ̾Լǻ׫᷷ӧܵιíտۡѬҼʼ̮ش㷿˸Լա