NAVLE（北美执业兽医考题）Day 359
单选题，正确答案是100分，非正确答案为0分，Good Luck！
In temperate North America, one animal is seasonally polyestrous (multiple estrus cycles) in the winter when the weather is COLD and the other animal is seasonally polyestrous in the spring and summer when 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？
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