请问怎么理解使a成立的一个充分不必要条件是b? 知乎 Template




You need a modern browser try chrome, to view this.

Background image: Hide Show

View Larger Image Image Credit: zhihu.com






Try and sketch some of theseCrone, Calliope, Popcorn, Hot water bottle, Square, Scorpion, Tornado, Library, Igloo, Genius, view more ideas


please wait, the page is loading...

More Sketches

Take a peek at some of the sketches created by our users, are you a sketchite?

anonymous
anonymous
sketch #378 Guess what flag? ɔılqndǝɹ ɥɔǝzϽ


anonymous
anonymous
sketch #3488 cats


Tom Kelly
sketch #4 Nirvana Smiley


anonymous
anonymous
sketch #2279 puppetsss


anonymous
anonymous
sketch #5226


James Forest
sketch #3014 Fancy "S "


anonymous
anonymous
sketch #4661 Woodpecker by Hsien-Ying Hsieh


anonymous
anonymous
sketch #2072


anonymous
anonymous
sketch #1138


anonymous
anonymous
sketch #4273


Mirnes Sinanovic
sketch #2640 Marge by Mirnes Sinanovic


Raisa Mahmud
sketch #2058


anonymous
anonymous
sketch #4983


anonymous
anonymous
sketch #4867 Johnny Depp Ronin Ronin


anonymous
anonymous
sketch #2892 Joker by Frank Aguiar Au


anonymous
anonymous
sketch #1562 Shaking red horse


anonymous
anonymous
sketch #4698


anonymous
anonymous
sketch #5351


anonymous
anonymous
sketch #5150 Regina from Dino Crisis by Hsien-Ying Hsieh


anonymous
anonymous
sketch #5101


anonymous
anonymous
sketch #1519


anonymous
anonymous
sketch #4362 cow


anonymous
anonymous
sketch #132


anonymous
anonymous
sketch #4916


anonymous
anonymous
sketch #5415


anonymous
anonymous
sketch #2035 Ernest Hemingway... chayrolfrypan


anonymous
anonymous
sketch #2989 Little Chibi by Loai Issa


anonymous
anonymous
sketch #5204

tomski请问怎么理解使a成立的一个充分不必要条件是b? 知乎 coloring