下图所示遗传系谱图所表示的遗传病不可能是()
A.X染色体隐性遗传病
B.X染色体显性遗传病
C.常染色体隐性遗传病
D.线粒体遗传病
参考答案:A
Last month, I _______ the high jump in our school sports meet.
A. took part in B. joined C. join
户用沼气室外管道距可燃点的距离是多少?