测定0.2级和0.5级电能表的基本误差时,要求环境温度对标准值的偏差分别不超过()。
A.±3℃,±3℃
B.±2℃,±3℃
C.±2℃,±2℃
D.±3℃,±2℃
参考答案:C
Hearing that most of the members voted against her, she________a smile. [ ]
A. wore
B. managed
C. performed
D. controlled
我焦化公司何时被确定为特种设备规范化管理示范基地?