以下方程中能够说明磁感应线是闭合的是
A: [img=104x31]1803a12933df1ff.png[/img]
B: [img=82x31]1803a1293f29092.png[/img]
C: [img=90x31]1803a1294a08326.png[/img]
D: [img=135x44]1803a12956bad06.png[/img]
A: [img=104x31]1803a12933df1ff.png[/img]
B: [img=82x31]1803a1293f29092.png[/img]
C: [img=90x31]1803a1294a08326.png[/img]
D: [img=135x44]1803a12956bad06.png[/img]
举一反三
- 以下方程中能够说明磁感应线是闭合的是 A: [img=104x31]1803b2eb4af9b6e.png[/img] B: [img=82x31]1803b2eb5482536.png[/img] C: [img=90x31]1803b2eb5f3ae5d.png[/img] D: [img=135x44]1803b2eb6cbcaa2.png[/img]
- 以下方程中能够说明磁场是非保守力场的是 A: [img=104x31]1803b2e9dde7bc7.png[/img] B: [img=82x31]1803b2e9e914722.png[/img] C: [img=90x31]1803b2e9f3747f5.png[/img] D: [img=135x44]1803b2e9ff2661f.png[/img]
- 以下方程中能够说明磁场是非保守力场的是 A: [img=104x31]1803a127b648e00.png[/img] B: [img=82x31]1803a127c1f8cf0.png[/img] C: [img=90x31]1803a127cd79dee.png[/img] D: [img=135x44]1803a127da3f726.png[/img]
- 令F(x):x是有理数,G(x):x是实数。将命题“所有的有理数都是实数,但有的有实数不是有理数”符号化为() 未知类型：{'options': ['17e0a83a4157352.jpgx(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))'], 'type': 102}
- 下列函数中为同一个函数的是() 未知类型：{'options': ['f(x)=x,g(x)=[img=25x39]17e43f7e294a229.png[/img]', ' f(x)=x,g(x)=[img=39x24]17e43f7e31cdea3.jpg[/img]', ' f(x)=x,g(x)=[img=35x25]17e43f7e3c419e9.png[/img]', ' f(x)=|x|,g(x)=[img=35x25]17e43f7e3c419e9.png[/img]'], 'type': 102}