鳞屑
参考答案:
为干燥或油腻的角质细胞的层状堆积,由表皮细胞形成过快或正常焦化过程受干扰所致。
As a couple ,the Smiths can always make the _____ decision to work through their problems
A.conventional
B.courageous
C.conscious
D.compulsory
如何利用经典性条件作用帮助学生热爱某门学科?