题目选项分析

When ironed with water and steady heat, acrylic, a petroleum-based synthetic fiber, softens and drapes with an almost silken feel and staying this way whether or not the heat is gone and the water has dried.

When ironed with water and steady heat, acrylic, a petroleum-based synthetic fiber, softens and drapes with an almost silken feel and staying this way whether or not the heat is gone and the water has dried.