明代中央行政体制废除了宰相制度，确立了( )
A．三公九卿制
B．二府三司制
C．内阁制
D．北南面官制
参考答案：C
—Tom can't find his gloves. Are these blue gloves his?
—No, they _ be his. His gloves are black.
A．must
B．may
C．can't
D．mustn't
脊髓小脑性共济失调（scA）伴眼底视网膜色素变性的亚型是（）
A.SCA1
B.SCA3
C.SCA5
D.SCA7
E.SCA3
