4.在动物实验中正确设置对照组不容易.例如要选择30个完全相似的动物将其均分为对照组和实验组就比较困难.那么进行这种实验时你认为 Template




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

Background image: Hide Show

View Larger Image Image Credit: 1010jiajiao.com






Try and sketch some of theseFire, Walrus, Lobbyists, Birdhouse, Stake, Platypus, Cow, Puppeteer, Saddle oxfords, Steam engine, 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 #5284


anonymous
anonymous
sketch #4984 Zombie by London Waterlilly


anonymous
anonymous
sketch #5201 Ponyta by WatasHi Satemura Oke


anonymous
anonymous
sketch #5346


anonymous
anonymous
sketch #3539 Octo by Aristo A. Kadir


anonymous
anonymous
sketch #2892 Joker by Frank Aguiar Au


anonymous
anonymous
sketch #4896


anonymous
anonymous
sketch #4393 ant


anonymous
anonymous
sketch #5330 Frozen by Amanda Kachadurian


anonymous
anonymous
sketch #5189


Pascal Quéru
sketch #2479 C 'est qui ? Un rasta qui a manger trop de poulpe farcis. ? Un vieux chanteur de blue grass ? Najdica tomktoo ? A vous de me dire...


BaGaz Anggara
sketch #2836 Angry smurf maradona by BaGaz Anggara


sketchmaster
sketch #2619 Underwater by sketchmaster


anonymous
anonymous
sketch #3701 amazing Skull


anonymous
anonymous
sketch #5351


anonymous
anonymous
sketch #5249 Adele - Skyfall by Mert Arda Yiğit


anonymous
anonymous
sketch #3166 Axl Rose by Jessie Lightwood


anonymous
anonymous
sketch #5155


anonymous
anonymous
sketch #2144


anonymous
anonymous
sketch #3608 Skeleton king by Thania Arruda


anonymous
anonymous
sketch #5208 Alf by David Rossien


anonymous
anonymous
sketch #1923 12


anonymous
anonymous
sketch #4691 Itachi by Jaqueline Salazar


anonymous
anonymous
sketch #5285


anonymous
anonymous
sketch #2337


anonymous
anonymous
sketch #20471


anonymous
anonymous
sketch #5205

tomski4.在动物实验中正确设置对照组不容易.例如要选择30个完全相似的动物将其均分为对照组和实验组就比较困难.那么进行这种实验时你认为 coloring