吗啡激动脊髓胶质区、丘脑内侧、脑室及导水管周围灰质的阿片受体,引起( )
A.欣快作用B.缩瞳作用C.镇痛作用D.镇咳作用E.胃肠活动变化
参考答案:C
The restaurant was on__ _fire and the people burnt in the fire were taken to___ _ hospital.
A.the; /
B./; /
C.the; the
D./; the
再生后乙二醇贫汇浓度控制在多少为宜?是否越高越好?