干部人事档案材料的载体一般应使用（）规格的办公用纸，材料左边应留出2至2.5厘米装订边。

A.A4

B.16开

C.B5

D.B4

For a client in addisonian crisis, it would be very risky for a nurse to administer

A．potassium chloride.

B．normal saline solution.

C．hydrocortisone.

D．fludrocortisone.