NAVLE（北美执业兽医考题）Day 359

Q1:In temperate North America, one animal isseasonally polyestrous (multiple estrus cycles) in the winter when the weatheris COLD and the other animal is seasonally polyestrous in the spring and summerwhen weather is WARM. Both give birth in the Spring. Which animals are these?在北美的温带，一种动物在冬天温度较低时季节性多次发情（多个发情周期），另一个动物是春天和夏天气候温暖时季节性多次发情，两种动物都是春季生产。这些是什么动物？Find out the answer by clicking on one ofthe listed choices. Good luck!点击列出的选项找出答案，祝大家好运