问题:
A、as good as wool.
B、as good as an insect's body.
C、not as good as natural materials.
D、better than natural materials.
● 参考解析
公众号搜题更便捷
扫码关注题大师公众号
文字、语音、截图都可搜题
亿级题库 秒出结果
相关题库