Your company CEO just sent you an E-mail asking you to make a presentation on your project,which has been in progress for 10 months,to all identified internal and external stakeholders.He scheduled the presentation for next Monday.You expect more than 50 people to atten D.The first step in preparing the presentation is to（）

A.define the audience

B.determine the objective

C.decide on the general form of the presentation

D.plan a presentation strategy

小汗腺的分泌受哪项因素的影响（）。

A.雄激素

B.雌激素

C.交感神经

D.温度

E.精神