问题
填空题
化工管道泵等要求耐腐蚀耐老化性能的零件，可选用（）工程塑料。
答案
参考答案：聚四氟乙烯
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化工管道泵等要求耐腐蚀耐老化性能的零件，可选用（）工程塑料。
参考答案：聚四氟乙烯
| Choose the word or expression from the box to replace the underlined part in each sentence. (从方框内选择与划线部分意思最接近的单词或短语，用A，B，C…或G等表示。) | |
( )2．Do you know who invented the watch? ( )3．That woman can calculate numbers like lightening. ( )4．He is really a very tough guy and we are all afraid him. ( )5．Our English teacher is really very popular among us. We all like her so much. ( )6．We all know that we needn't wear trainers today. |