骨骼肌的牵张反射是指A．受牵拉的同一肌肉发生收缩 B．同一关节

搜题请搜索小程序“爱下问搜题”

问题单项选择题

骨骼肌的牵张反射是指

A．受牵拉的同一肌肉发生收缩

B．同一关节的协同肌发生收缩

C．同一关节的协同肌发生抑制

D．同一关节的拮抗肌发生兴奋

E．伸肌和屈肌都收缩

答案

参考答案：A

单项选择题

关于肝素的叙述，错误的是（）

A、抗凝血作用缓慢而持久

B、体内、体外具有抗凝血作用

C、临床用于防治血栓栓塞性疾病

D、临床用于弥漫性血管内凝血症的高凝期

E、常用给药途径为皮下注射或静脉给药

选择题

China has recently ______ its waters controls near the Diaoyu Islands to prevent Chinese fishing boats from ______ in the East China Sea．

A．show up; attacking

B．taken up; having attacked

C．stepped up; being attacked

D．picked up; having been attacked