Please fill the survey up to design a fashion, warm MHR winter uniform which meanwhile shows our MHR spirit.
请大家积极配合，设计出一套时尚保暖，又能体现MHR精神的冬季系服！
2
This peper gives two necessary and sufficient conditions for a ring to be a nil MHR-ring. It is obtained that any nil MHR-ring is extension closed.
给出满足主右理想极小条件诣零环的两个充要条件，此类环是扩张闭的。
3
Maximal heart rate (MHR), double product of maximal heart rate and systolic blood pressure, and maximal endurance index (MEI) were measured during submaximal supine bicycle exercise.