下列不属于一类动物疫病的病种是？（）
A、口蹄疫
B、高致病性禽流感
C、鸡新城疫
D、禽白血病
参考答案：D
He began ____ music at his twenties and now he is an excellent ____. [ ]
A. writing, artist
B. wrote, scientist
C. to write, musician
D. write, painter
独立自主和平外交政策的基本原则有哪些？
