内测千分尺校对用的环规，经检定其尺寸偏差超过了±0.003mm，则不应再将其作为内测千分尺校对所用。
参考答案：错
下列哪项为 * * 癌的临床特征（）
A.漏斗征
B.帐篷征
C.彗星尾征
D.晕圈征
E.酒窝征
Not a single song _____ at yesterday's party. [ ]
A. she sang
B. sang she
C. did she sing
D. she did sing
