单选题 "Mylar" in line 1 of the third paragraph is ______.

【正确答案】 B
【答案解析】[考核题型] 词语辨析题
[解析] 根据该词后面提到"which is not only...does not absorb water"可以推知Mylar和尼龙一样同属人造材料,答案为B。