票据交换岗位属重要岗位，需定期轮换，票据交换员应实行（）轮换制度
A、半年
B、一年
C、二年
D、三年
参考答案：B
皮肤尼氏征（Nikolsky）反应阳性的是（）
A.血管神经性水肿
B.盘状红斑狼疮
C.疱疹样口炎
D.天疱疮
E.类天疱疮
Directions:
Write a poster to your schoolmates, informing them of a new book to be released. You should write about 100 words on ANSWER SHEET 2.
Do not sign your own name at the end of the letter; use "Li Ming" instead.
Do not write the address.
