关于二维随机变量<img src="https://static.zxtiku.com/wangke/imgs/topic/2519a5f55fddbea44f8f82660e64ca70.jpg"/>的分布函数为<img src="https://static.zxtiku.com/wangke/imgs/topic/90311650723408e366c2f214592ddaf9.jpg"/>，下列说法正确的是（）。 A. 固定<img src="https://static.zxtiku.com/wangke/imgs/topic/cd53ac6269778e66c76f9a53135d538c.jpg"/>，<img src="https://static.zxtiku.com/wangke/imgs/topic/90311650723408e366c2f214592ddaf9.jpg"/>对<img src="https://static.zxtiku.com/wangke/imgs/topic/a212ff86719495cc9f1235d91e9a04ad.jpg"/>具有右连续性 B. 固定<img src="https://static.zxtiku.com/wangke/imgs/topic/a212ff86719495cc9f1235d91e9a04ad.jpg"/>，<img src="https://static.zxtiku.com/wangke/imgs/topic/90311650723408e366c2f214592ddaf9.jpg"/>对<img src="https://static.zxtiku.com/wangke/imgs/topic/cd53ac6269778e66c76f9a53135d538c.jpg"/>具有单调不减的性质 C. <img src="https://static.zxtiku.com/wangke/imgs/topic/90311650723408e366c2f214592ddaf9.jpg"/>取值在0到1之间 D. <img src="https://static.zxtiku.com/wangke/imgs/topic/38de94dcef8164d5e69f9bf70c886219.jpg"/>