DC-DVM的定级标准主要以其基本量程内误差系数（a＋b）大小和年稳定误差来划分。
参考答案：对
-- Why didn’t you go to Mike’s birthday party yesterday?
-- Well, I _____, but I forgot it.
A．should
B．would
C．should have
D．must have
鸣风绝望中，怀着对觉慧深深的爱，投进了晶莹的湖水中，鸣凤的死对觉慧有什么影响？
