13N-NH3进入心肌的机制错误的是()
A.钠钾ATP酶转运
B.自由扩散
C.心肌细胞主动摄取
D.心肌细胞胞饮
E.钙离子通道转运
参考答案:A, C, D, E
_____ is no need _____. [ ]
A. It; complaining
B. That; complaining
C. There; to complain
D. This; to complain
判断单模光纤和多模光纤的唯一标准时芯径尺寸