测量标准申请建标考核前,该测量标准和配套设备应正常运行多长时间?
参考答案:
必须经过半年以上的稳定性考核,证明其复现的量值稳定可靠后,才能申请建标
Millie is a good swimmer, and she can swim _____ a fish.[ ]
A. likes
B. is like
C. like
D. is likes
电量变送器的精确度等级,不应低于0.5级。( )