当温度升高时，晶体管的[img=17x22]18036a99f12fb48.bmp[/img]、[img=32x24]18036a99f8b01e5.bmp[/img]、[img=32x24]18036a9a00cd68d.bmp[/img]的变化情况是 。
A: [img=17x22]18036a9a091181d.bmp[/img]增加、[img=32x24]18036a9a1178683.bmp[/img]和[img=32x24]18036a9a19ddfa2.bmp[/img]减小
B: [img=17x22]18036a9a091181d.bmp[/img]和[img=32x24]18036a9a1178683.bmp[/img]增加、[img=32x24]18036a9a32bc1e5.bmp[/img]减小
C: [img=17x22]18036a9a091181d.bmp[/img]和[img=32x24]18036a9a43b97db.bmp[/img]减小、[img=32x24]18036a9a1178683.bmp[/img]增加
D: [img=17x22]18036a9a091181d.bmp[/img]、[img=32x24]18036a9a1178683.bmp[/img]和[img=32x24]18036a9a65d8ac6.bmp[/img]都增加
A: [img=17x22]18036a9a091181d.bmp[/img]增加、[img=32x24]18036a9a1178683.bmp[/img]和[img=32x24]18036a9a19ddfa2.bmp[/img]减小
B: [img=17x22]18036a9a091181d.bmp[/img]和[img=32x24]18036a9a1178683.bmp[/img]增加、[img=32x24]18036a9a32bc1e5.bmp[/img]减小
C: [img=17x22]18036a9a091181d.bmp[/img]和[img=32x24]18036a9a43b97db.bmp[/img]减小、[img=32x24]18036a9a1178683.bmp[/img]增加
D: [img=17x22]18036a9a091181d.bmp[/img]、[img=32x24]18036a9a1178683.bmp[/img]和[img=32x24]18036a9a65d8ac6.bmp[/img]都增加
举一反三
- X为随机变量，E(X)=-1,D(X)=3,则[img=105x27]17de66c4ef75d99.png[/img] A: 18 B: 9 C: 30 D: 32
- X为随机变量，E(X)=-1，D(X)=3，则E(3[img=24x22]1803da40b5dbfd6.png[/img]+20)=( ) A: 18 B: 9 C: 30 D: 32
- X为随机变量，E(X)=-1，D(X)=3，则E(3[img=24x22]1803da40ac7a8ce.png[/img]+20)=( ) A: 18 B: 9 C: 30 D: 32
- X为随机变量，E(X)=-1，D(X)=3，则E(3[img=24x22]1803381b293bffb.png[/img]+20)=( ) A: 18 B: 9 C: 30 D: 32
- X为随机变量，E(X)=-1，D(X)=3，则E(3[img=24x22]17de66bf652c147.png[/img]+20)=( ) A: 18 B: 9 C: 30 D: 32