题目

使用Gold Wave软件编辑某音频文件，部分界面如图所示。（ ）下列说法正确的是（ ） A . 当前声音文件的存储容量约为6．4MB B . 当前状态下，执行“删除”命令后左声道的第14~19秒将出现静音 C . 执行“插入静音”命令，当前状态下插入15秒静音，文件播放时有一段静音 D . 执行“选定部分另存为”命令，按默认格式保存，生成的文件为双声道格式 Many people used to be shy. But they all have overcome(战胜) this problem successfully. Lucy is a fourteen-year-old girl. Over the last 5 years or so, she has worked very hard at dealing with her shyness. She started by making conversations with “friends’ friends”. It did take a lot of effort(努力) but was useful. Now she can talk to almost everyone. Peter is thirteen years old. He used to be shy, too. But he had to change since he took part in a baseball club two years ago. He has made many friends there. Andy was also a shy girl in the past. But a year ago, she started working as a waitress at a restaurant on weekends. That’s really helpful. She has become more outgoing now.【1】It took Lucy about five years to overcome her shyness.【2】Lucy overcame her shyness by making conversations with “friends’ friends”.【3】Peter is 12 years old now.【4】Peter has many friends now.【5】Andy started working at a market on weekends a year ago.