Some directors have the company sit and read the play together for three or four days before rehearsing it.

A．group of players or actors

B．group of people together

C．people in a business firm

D．staff of a theatre

影响预后的因素有

A．年龄大，低钙血症休克

B．年龄大，血淀粉酶非典型增高

C．低钙血症，血淀粉酶<500SomogyiU

D．休克，血淀粉酶<500SomogyiU

E．无明显腹痛，血淀粉酶低于500SomogyiU