听录音,给下面的句子排序
①Chen Jie is a helpful girl.____
②What's your friend like?____
③He can speak English and Chinese.____
④Our new music teacher will come today.____
⑤She's shy but clever.____
直线2x-y+1=0与直线ax+2y+1=0的垂直,则a= ( )
下面句子中没有语病的一句是( )