合成纤维原料易得，不受自然条件限制．制成品具有______、______、______和______等优点．用合成纤维制成的衣服美观大方，结实耐穿，但______和______较差．因此，合成纤维常常与______或______混合纺织，使衣服穿起来既舒适又挺括．
合成纤维具有强度高、弹性好、耐磨和耐腐蚀的性质，但是吸水性和透气性差，棉纤维或羊毛纤维具有较好的吸水性和透气性，合成纤维可以与棉纤维或羊毛纤维混纺，所以本题答案为：强度高，弹性好，耐磨，耐化学腐蚀，吸水性，透气性，棉纤维，羊毛纤维．
| 根据短文内容，用方框中所给的单词的适当形式填空，每词限用一次。 | |
people can play tricks on their ___1____. For example, you can try to make one of your friends ____2____ something that is not true. If your friend falls into your trick, he or she is an April fool. “Rita, the head teacher wants you,” said one of her classmates on April 1st. “All right,” she answered and ran to the ____3____. When she finally found, the teacher told her that he didn’t want her. When Rita came back, everyone around her laughed and ____4____ “April fool!” Rita laughed too, but felt so sorry ____5____ having been made a fool. |