A: [img=381x310]1803d7610462b0a.png[/img]
B: [img=371x315]1803d7610ee361e.png[/img]
C: [img=365x312]1803d76119214ce.png[/img]
D: [img=371x305]1803d761245c02f.png[/img]
举一反三
- 圆柱和圆球相贯后的投影,正确的是: A: [img=381x310]1803d0e01a8f537.png[/img] B: [img=371x315]1803d0e02648b52.png[/img] C: [img=365x312]1803d0e030a57de.png[/img] D: [img=371x305]1803d0e03c199d8.png[/img]
- 圆柱和圆球相贯后的投影,正确的是: A: [img=381x310]18037afbc780076.png[/img] B: [img=371x315]18037afbd2e30ec.png[/img] C: [img=365x312]18037afbdd9d686.png[/img] D: [img=371x305]18037afbe864896.png[/img]
- 圆柱和圆球相贯后的投影,正确的是: A: [img=381x310]180335832f5f85c.png[/img] B: [img=371x315]180335833b8a105.png[/img] C: [img=365x312]180335834685719.png[/img] D: [img=371x305]18033583526cd3f.png[/img]
- 圆柱和圆球相贯后的投影,正确的是: A: [img=381x310]18037e3a8745d2b.png[/img] B: [img=371x315]18037e3a926d0d0.png[/img] C: [img=365x312]18037e3a9f320ef.png[/img] D: [img=371x305]18037e3aab2c422.png[/img]
- 圆柱和圆球相贯后的投影,正确的是: A: [img=381x310]180356b9c179f3e.png[/img] B: [img=371x315]180356b9ccd89bd.png[/img] C: [img=365x312]180356b9d7655e4.png[/img] D: [img=371x305]180356b9e3a9f26.png[/img]
内容
- 0
在下列命题中:如果f(x)=[img=28x44]17e0bf9914bb2f1.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0;如果f(x)=[img=28x44]17e0bf992111a1c.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0;如果f(x)=[img=55x44]17e0bf992d8de0a.png[/img],那么[img=29x29]17e0bf9939482bb.png[/img]f(x)不存在;如果f(x)=[img=87x53]17e0bf99450fa82.png[/img],那么[img=27x29]17e0bf97582597b.png[/img]f(x)=0。其中错误命题的个数是( A: 0 B: 1 C: 2 D: 3
- 1
下列4个集合中是空集的是() A: {x|[img=18x22]1802f060e2f728f.png[/img]+1=0} B: {x|[img=18x22]1802f060e2f728f.png[/img]<-x} C: {x|[img=18x22]1802f060e2f728f.png[/img]=0} D: {x|[img=18x22]1802f060e2f728f.png[/img]-1=0}
- 2
下列4个集合中是空集的是() A: {x|[img=18x22]1803d021d498831.png[/img]+1=0} B: {x|[img=18x22]1803d021d498831.png[/img]<-x} C: {x|[img=18x22]1803d021d498831.png[/img]=0} D: {x|[img=18x22]1803d021d498831.png[/img]-1=0}
- 3
下列4个集合中是空集的是() A: {x|[img=18x22]1803d0240bcad39.png[/img]+1=0} B: {x|[img=18x22]1803d0240bcad39.png[/img]-x} C: {x|[img=18x22]1803d0240bcad39.png[/img]=0} D: {x|[img=18x22]1803d0240bcad39.png[/img]-1=0}
- 4
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}