A:eventually
B:extremely
C:gradually
D:constantly
看拼音,写汉字;
tái àn yǐng
____头 ____上 ____子
下列物质在氧气中燃烧,火星四射,有黑色固体生成的是( )
The Dongying-Hainan airline for about 5 months. I have taken the flights three times.