1) Have an internal skeleton made of bones a) Invertebrates b) Worms c) Vertebrates d) Snail 2) Mammals are ... a) Viviparous b) Oviparous 3) Birds are ... a) Oviparous b) Viviparous 4) Most of mammals are covered with a) Scales b) Feather c) Fur 5) Birds have teeth a) True b) False 6) Birds have a beak a) True b) False 7) Amphibians are covered with a) Scales b) Bared skin c) Fur d) Feather 8) Amphibians live in a) Water b) Land c) Both 9) Which is the larger group of invertebrates a) Snails b) Crabs c) Jellyfish d) Insects

Science

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？