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 theseCarrots, Fat guy, Tree swing, Spyglass, Wolf, Horse, Lobby, Ambulance, Omelet, Man, 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 #5279


anonymous
anonymous
sketch #3857


anonymous
anonymous
sketch #5070 The Rolling Stones by Roby Krdoso


anonymous
anonymous
sketch #5156 Angry Bird by Roberto Castro Colimil


anonymous
anonymous
sketch #1122 norooz


anonymous
anonymous
sketch #5228 Rin & Len by Mark Phillips


anonymous
anonymous
sketch #3321 Baby Mirella Flowers


anonymous
anonymous
sketch #2922


anonymous
anonymous
sketch #5205


Rachel Roe
sketch #33 Flutter-bys


Raisa Mahmud
sketch #2061


anonymous
anonymous
sketch #3765 Happy easter!


anonymous
anonymous
sketch #1562 Shaking red horse


anonymous
anonymous
sketch #5172 Cheshire Cat by Juan Garcia


anonymous
anonymous
sketch #5159 Frank Briones Silvia Haynes


anonymous
anonymous
sketch #3617 D from Gorillaz by Joselyne Angel Gormaz


anonymous
anonymous
sketch #4821 Johnny M. by Z Ionut Ady


anonymous
anonymous
sketch #5067


anonymous
anonymous
sketch #5174


anonymous
anonymous
sketch #4566 Edward Scissorhands by Angel Ördoñez


anonymous
anonymous
sketch #5044


anonymous
anonymous
sketch #1972 Boogaloo @Memphis


anonymous
anonymous
sketch #3197 Dragon by Yuryi Zambrano


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


anonymous
anonymous
sketch #3000


anonymous
anonymous
sketch #5153 Random Access Memories by Khin Nyunt

tomski4.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