2.You can erase pencil marks with a rubber. 你可以用橡皮擦掉铅笔记号。 3.If plastic and rubber are burnt, they'll give off poisonous gases
2.You can erase pencil marks with a rubber. 你可以用橡皮擦掉铅笔记号。 3.If plastic and rubber are burnt, they'll give off poisonous gases