中波紫外线只能通过表皮的()
A.棘层
B.颗粒层
C.基底层
D.角质层
E.透明层
参考答案:C
—Let's go to buy some presents for Millie. Because tomorrow is her birthday.
—Now? It's 11 p.m. I'm afraid the shop is ______. [ ]
A. closed
B. opened
C. close
D. open
炉料中的吸附水在()就可蒸发出来。对冶炼过程影响不大。