骨骼肌细胞贮存Ca2+的主要部位在（）
A.纵管
B.横管
C.微管
D.终末池
E.肌质网
参考答案：D
（）should develop, implement and maintain a safety mangement system which includes procedures for internal audits and mangement reviews.
A.Every company
B.Every vessel
C.Every country
D.USA
