“负重屈肘”练习时,肱肌、肱二头肌等在近固定情况下完成克制工作,它们属于()
A. 原动肌
B. 协同肌
C. 固定肌
D. 对抗肌
Proper dispersion of fuel in a diesel engine cylinder is dependent upon the ()
A. injection pressure
B. shape of combustion space
C. turbulence in combustion space
D. all of the above
在除夕夜一家人团聚,熬夜迎接农历新年的到来,被称作为()?