遗传性共济失调三大特征_________、_________及_________。
参考答案：世代相传的遗传背景；共济失调表现；小脑损害为主的病理改变
—_____ do you go to see movies?
—About twice a month. [ ]
A. How long
B. How many
C. How often
D. How far
简述民事法律事实的种类。
