题目

Rescue workers at the San Jose gold and copper mine in northern Chile had reason to sing this week．A small hole drilled into the earth became a passage（通道） to freedom for thirty-three trapped miners．They spent sixty-nine days underground．Never have people been trapped for so long so deeply, says a doctor at NASA, the American space agency, which helped in the rescue．But the chief medical officer for the miners said most are in good enough health to leave the hospital within a day or so．The first three were released from the hospital Thursday night．For much of the day the mi汉代淑女王昭君出塞前，在花园中用琵琶独奏《长相知》，凄美的乐声扣人心弦，由此可知（　　）A．此乐声是由于手指振动发生的B．此乐声是琴弦振动发生的C．此乐声由空气振动发声的D．此乐音是由琵琶的外壳振动发生的