下述哪项不属于产后血晕的特点()
A.产妇分娩后突然头晕眼花
B.不能坐起
C.半身不遂
D.泛恶欲吐
E.甚至昏厥不省人事
参考答案:C
A test of a hypothesis that the means of two normally distributed populations are equal based on two independent random samples:()
A. is based on a Chi Square statistic.
B. is a paired -comparisons test.
C. is done with a t -statistic.
根据神经元在反射弧中的地位,可将神经元分类为()。
A.胆碱能神经元,肾上腺素能神经元
B.传入神经元,传出神经元,中间神经元
C.中枢神经元,外周神经元
D.多极神经元,单极神经元,假单极神经元
E.Ⅰ类神经元,Ⅱ类神经元,Ⅲ类神经元,Ⅳ类神经元