有一天早上,细心的小英发现,远洋归来的爸爸刷牙时牙龈出血,她便建议妈妈去市场买( )
声波和光波分别由空气进入水中,则( )
下面对《渔家傲·秋思》的理解,不恰当的一项是:( )
— What did the teacher say just now?
— He asked them _______ the math problem.