题干
So Young, the movie ______ was filmed in Nanjing, is on in many cities.
A：which
B：what
C：who
D：when
答案(点此获取答案解析）
A
So Young, the movie ______ was filmed in Nanjing, is on in many cities.
A：which
B：what
C：who
D：when
通透性的高低可以用电导（g）表示，电导大，离子通透性高，电导小，离子通透性低．下图表示神经细胞接受刺激产生动作电位过程中，细胞膜膜电位变化及对Na+和K+通透性的分别是（gNa+、gK+分别表示Na+、K+的电导）
