# 2选择型Which characteristic is unique to mammals?Laying eggsBreathing with gillsHaving hair or furHaving scales
# 3选择型What is the main function of fish gills?To filter foodTo breathe underwaterTo protect from predatorsTo help with balance
# 4选择型Which animal is known for its ability to change color for camouflage?ChameleonElephantKangarooPanda
# 5选择型Which characteristic is typical of amphibians?Having scalesLiving in both water and landFlyingHaving feathers
# 6选择型What feature is most associated with mammals?Laying eggsGiving birth to live youngHaving gillsHaving feathers
# 7选择型Which characteristic is common to all birds?Having scalesHaving feathersHaving finsLiving underwater
# 9选择型Which characteristic is typical of primates?Having feathersWalking on four legsOpposable thumbsLaying eggs
# 11选择型What characteristic is shared by all mammals?Having scalesProducing milkHaving feathersLaying eggs
# 12选择型What is a notable characteristic of reptiles like snakes?Having furShedding their skinFlyingLiving in water