青年期特应性皮炎主要皮损为()。
A.渗出
B.丘疹
C.苔藓样变
D.水疱
E.溃疡
参考答案:C
A month’s _____ is required from whichever party wishes to end the agreement.
A.message
B.letter
C.sentence
D.notice
若(a﹣2)a+1=1,则a=_________.