设L是从A(0,1,1)到B(2,3,3)的直线段，则第二类曲线积分[img=204x48]18030fa20aaf38b.png[/img]等于
A: [img=18x43]18030fa2137287b.png[/img]
B: 7
C: -7
D: [img=34x43]18030fa21bc85b5.png[/img]
E: [img=34x43]18030fa224aa4da.png[/img]
F: [img=18x43]18030fa22d027f2.png[/img]
G: 6
H: -6
A: [img=18x43]18030fa2137287b.png[/img]
B: 7
C: -7
D: [img=34x43]18030fa21bc85b5.png[/img]
E: [img=34x43]18030fa224aa4da.png[/img]
F: [img=18x43]18030fa22d027f2.png[/img]
G: 6
H: -6
举一反三
- 设L是从A(0,1,1)到B(2,3,3)的直线段，则第二类曲线积分[img=204x48]1803c1f0caf4a5b.png[/img]等于 A: [img=18x43]1803c1f0d323d79.png[/img] B: 7 C: -7 D: [img=34x43]1803c1f0daf4cbd.png[/img] E: [img=34x43]1803c1f0e2ee026.png[/img] F: [img=18x43]1803c1f0eb47dde.png[/img] G: 6 H: -6
- 设L是从A(0,1,1)到B(2,3,3)的直线段，则第二类曲线积分[img=204x48]180322ae820c008.png[/img]等于 A: [img=18x43]180322ae8a6072c.png[/img] B: 7 C: -7 D: [img=34x43]180322ae937eae5.png[/img] E: [img=34x43]180322ae9b68bb1.png[/img] F: [img=18x43]180322aea4b5212.png[/img] G: 6 H: -6
- 设L是从A(0,1,1)到B(2,3,3)的直线段，则第二类曲线积分[img=204x48]18038578bfb8833.png[/img]等于 A: [img=18x43]18038578c89622c.png[/img] B: 7 C: -7 D: [img=34x43]18038578d110d17.png[/img] E: [img=34x43]18038578d9dd430.png[/img] F: [img=18x43]18038578e1f4641.png[/img] G: 6 H: -6
- 设L是从A(0,1,1)到B(2,3,3)的直线段，则第二类曲线积分[img=204x48]18030fa20aaf38b.png[/img]等于 未知类型：{'options': ['', '7', '-7', '', '', '', '6', '-6'], 'type': 102}
- 设L是从A(0,1,1)到B(2,3,3)的直线段，则第二类曲线积分[img=204x48]1803c1f0caf4a5b.png[/img]等于 未知类型：{'options': ['', '7', '-7', '', '', '', '6', '-6'], 'type': 102}