感觉传导研究中记录的是神经电位,即是运动单位电位,故又称神经电图。()
参考答案:错
—_______ is it from your school to your home?
—It's about five hundred metres. [ ]
A. How far
B. How much
C. How long
D. How many
乳剂受外界因素作用,使体系中油或乳化剂发生变质的现象称为()
A.酸败
B.破裂
C.分层
D.转相
E.絮凝