当服务员与客人交谈时,(),客人会觉得服务员很无礼。
A、双手放在背后
B、双手自然下垂于体侧
C、双手交叉于腹前
D、双手交叉于胸前
参考答案:D
Knowing office rules-whether _____ or not-is critical, especially for young job seekers.[ ]
A. written
B. writing
C. being written
D. having been
工件淬火后的回火可以减少变形和防止开裂。