空间曲线[img=178x61]1802fe70ff96284.png[/img]在[img=31x23]1802fe710878862.png[/img]上的投影曲线的参数方程为（ ）.
A: [img=409x29]1802fe7112c19d0.png[/img]
B: [img=340x29]1802fe711ce15bb.png[/img]
C: [img=354x29]1802fe712738e82.png[/img]
D: [img=351x29]1802fe7130ee91f.png[/img]
A: [img=409x29]1802fe7112c19d0.png[/img]
B: [img=340x29]1802fe711ce15bb.png[/img]
C: [img=354x29]1802fe712738e82.png[/img]
D: [img=351x29]1802fe7130ee91f.png[/img]
举一反三
- 空间曲线[img=178x61]1803d4598610533.png[/img]在[img=31x23]1803d4598e7180e.png[/img]上的投影曲线的参数方程为（ ）. A: [img=409x29]1803d4599a3653d.png[/img] B: [img=340x29]1803d459a503bb0.png[/img] C: [img=354x29]1803d459b187bbe.png[/img] D: [img=351x29]1803d459bd69143.png[/img]
- 空间曲线[img=178x61]1803a28b0aba5a0.png[/img]在[img=31x23]1803a28b136c1f1.png[/img]上的投影曲线的参数方程为（ ）. A: [img=409x29]1803a28b1d48f62.png[/img] B: [img=340x29]1803a28b2789dc5.png[/img] C: [img=354x29]1803a28b3296e08.png[/img] D: [img=351x29]1803a28b3d24330.png[/img]
- 空间曲线[img=178x61]1802fe70ff96284.png[/img]在[img=31x23]1802fe710878862.png[/img]上的投影曲线的参数方程为（ ）. 未知类型：{'options': ['', '', '', ''], 'type': 102}
- 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]
- 用强度为I，波长为[img=27x24]1802e3021e829f1.png[/img]的X射线(伦琴射线)分别照射锂Li（Z = 3）和铁Fe（Z = 26）．若在同一散射角下测得康普顿散射的X射线波长分别为[img=27x24]1802e3021e829f1.png[/img]Li和[img=27x24]1802e3021e829f1.png[/img]Fe（[img=27x24]1802e3021e829f1.png[/img]Li，[img=27x24]1802e3021e829f1.png[/img]Fe>[img=27x24]1802e3021e829f1.png[/img]），它们对应的强度分别为[img=27x24]1802e3021e829f1.png[/img]Li和[img=27x24]1802e3021e829f1.png[/img]Fe，则 A: [img=177x37]1802e30262d047c.png[/img] B: [img=173x32]1802e3026b65037.png[/img] C: [img=175x34]1802e3027495042.png[/img] D: [img=175x34]1802e3027d0b84c.png[/img]