[单选题]A.P{X≤0}=P{X≥0}=0.5B.f（一x）=1一f（x）C.F（x）=一F（—x）D.P{X≥2}=P{X＜2}=0.5

[单选题]A.P{X≤0}=P{X≥0}=0.5B.f（一x）=1一f（x）C.F（x）=一F（—x）D.P{X≥2}=P{X＜2}=0.5

[单选题]A.0.6B.0.7C.0.8D.0.9

[单选题]A.0.6B.0.7C.0.8D.0.9

[判断题]A.对B.错

[单选题]A.B.C.D.

[单选题]A.斜线式B.直线式C.横线式D.纵线式E.平面式

[单选题]A.氢化可的松B.丙酸睾酮C.雌二醇D.黄体酮E.异烟肼

[单选题]A.二萜B.三萜C.木脂素D.单萜E.鞣质

[单选题]A.86.1～6.4B.87.3～7.4C.86.8～6.9D.87.5～8.3E.83.9～4.0