喝醉酒的人，走路摇晃，站立不稳，这是由于酒精麻痹了人体的 ( )
A．大脑
B．小脑
C．脑干
D．脊髓
答案：B
小脑具有维持身体平衡的作用。
—Mum, can I wear my jeans to school?
—No, you _____ wear your school uniform.
That's the school rule.[ ]
A. can
B. can't
C. have to
D. may
在皮带运输机安装中，滚筒轴线的水平度偏差要求为偏差不应大于( )。
A．2/1000
B．1/1000
C．2mm
D．1mm
