离岗人员不需要签保密承诺书。
参考答案：错
I remember my daughter used to ask some questions that girls _______ would ask. [ ]
A. twice her age
B. twice so old as she
C. as twice old as her
D. twice old as her age
冷凝集素与红细胞结合最好的温度是（）
A.-20℃
B.4℃
C.25℃
D.37℃
E.42℃
