A:X染色体上的基因并非都与性别决定有关
B:伴性遗传不遵循基因的分离定律
C:伴X染色体隐性遗传具有隔代遗传的特点
D:伴X染色体隐性遗传具有交叉遗传现象
—What do you often do _______ classes to relax yourselves?
— We often chat together, do eye exercises or do some running around the school.
如图,一个绕过圆心的轴匀速转动的圆盘上有a、b、c三点,已知oc= 12 oa,则下列说法中错误的是( )