年内单位工作经验做法对税收工作有指导意义,在全国税务系统综合性会议作典型介绍的,可以考核中特别加分2分.
参考答案:错
---Mrs. White looks old for her age.
---Yes. It worries her most ______ her hair is turning gray. [ ]
A. while
B. if
C. that
D. for
光电倍增管的主要噪声有哪些?