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【多选题】
下列属于向心性收缩的是（）
A.
屈肘时的肱二头肌收缩
B.
负重屈肘后缓慢放松是的肱二头肌收缩
C.
伸膝时的股四头肌收缩
D.
下蹲时的股四头肌收缩
E.
足趾曲时的小腿三头肌收缩
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】People who do sleep research tell us that a person is a sort of "information processor." We have two ways to use the information we get each day. The first process is used when we are awake. It takes...
A.
people are likely to sleepwalk
B.
people become mentally active
C.
people often wake up
D.
people might do odd things
【单选题】子宫收缩力异常指的是
A.
节律性、极性、强度均不正常
B.
节律性、对称性正常但失去正常强度
C.
对称性、极性正常，节律性异常
D.
节律性正常，对称性和极性异常
E.
节律性、对称性、极性及宫缩的频率和强度均异常