表皮层
参考答案:
约占10%它是头发的外衣,成毛鳞片状对头发起保护作用,头发的粗硬光泽取决于这一层。毛鳞片层数越多头发越粗硬一般为3-15层
Would you mind changing seats with me?()
A.Yes, you can.
B.Of course, I like to.
C.No, I don't mind.
D.Certainly, please do.
接触网钢柱的接地电阻不大于()。
A、5Ω
B、10Ω
C、20Ω
D、30Ω