欲了解某高校大学生的身高情况，随机抽取了100名同学，计算其平均身高为170cm，标准差为5cm，则理论上有95%的大学生身高在下列哪个范围内？:______
A: [img=88x33]1802ce04028e134.png[/img]
B: [img=88x33]1802ce04028e134.png[/img]
C: [img=124x54]1802ce0412a6c96.png[/img]
D: [img=90x35]1802ce041af8917.png[/img]
E: [img=132x50]1802ce042304062.png[/img]
F: [img=126x51]1802ce042b52fe9.png[/img]
A: [img=88x33]1802ce04028e134.png[/img]
B: [img=88x33]1802ce04028e134.png[/img]
C: [img=124x54]1802ce0412a6c96.png[/img]
D: [img=90x35]1802ce041af8917.png[/img]
E: [img=132x50]1802ce042304062.png[/img]
F: [img=126x51]1802ce042b52fe9.png[/img]
举一反三
- 欲了解某高校大学生的身高情况，随机抽取了100名同学，计算其平均身高为170cm，标准差为5cm，则理论上有95%的大学生身高在下列哪个范围内？:______ A: [img=88x33]1803938e45bf43b.png[/img] B: [img=88x33]1803938e45bf43b.png[/img] C: [img=124x54]1803938e567457c.png[/img] D: [img=90x35]1803938e5f2aa56.png[/img] E: [img=132x50]1803938e6733ab9.png[/img] F: [img=126x51]1803938e7032418.png[/img]
- 欲了解某高校大学生的身高情况，随机抽取了100名同学，计算其平均身高为170cm，标准差为5cm，则理论上有95%的大学生身高在下列哪个范围内？:______ A: [img=88x33]18037a50a8e943b.png[/img] B: [img=88x33]18037a50a8e943b.png[/img] C: [img=124x54]18037a50ba7787a.png[/img] D: [img=90x35]18037a50c2c6e94.png[/img] E: [img=132x50]18037a50cb5f05e.png[/img] F: [img=126x51]18037a50d3f3e17.png[/img]
- 原电池（-）Pt︱Fe[img=17x22]1803dd54de61136.png[/img](1 mol·L[img=17x22]1803dd54e7299c0.png[/img]),Fe[img=17x22]1803dd54f0030fb.png[/img](1 mol·L[img=17x22]1803dd54fa39c0d.png[/img])‖Ce[img=17x22]1803dd5502f9d6b.png[/img]( mol·L[img=17x22]1803dd550b82a7d.png[/img]) ,Ce[img=17x22]1803dd55130efd2.png[/img]( mol·L[img=17x22]1803dd551af174c.png[/img]) ︱Pt(+)的电池反应是( )。 A: Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] = Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img] B: Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img] = Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] C: Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img] = Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] D: Ce[img=17x22]1803dd5534dbdef.png[/img] + Fe[img=17x22]1803dd552ca7541.png[/img] = Ce[img=17x22]1803dd552375aee.png[/img] + Fe[img=17x22]1803dd553dc33d1.png[/img]
- 图示电路为CE组态放大器。[img=298x240]18032d5df6ce32b.jpg[/img]
- 图示电路为CE组态放大器。[img=298x240]18032d5fca08c25.jpg[/img]