题干
根据句意和汉语注释，写出单词的正确形式。
（1）Guangdong is in the ____ (north) part of the city
（2）She danced so ____ (beauty) that everyone clapped their hands.
（3）Look! Their____ (wife) are waving to them
（4）Do you think noise ____ (pollute) is a terrible problem?
答案(点此获取答案解析）
northern,beautifully,wives,pollution
可在乳酸菌作用下分解而排除白色污染，下列有关聚乳酸的说法正确的是( )