题干
阅读短文，判断正误。
Hello, boys and girls. I'm Danny. I'm tall. I'm fat. I can draw my teacher. Look, this is my teacher. He's a new teacher. He's Mr Wang. He's tall. He is big. He can play football and swim. He can ride a bicycle, too. Look at the bicycle. It's not red. It's green. It's new. I like his bicycle. Can you ride a bicycle?
可在乳酸菌作用下分解而防止“白色污染”，下列有关聚乳酸的说法正确的是( )