椎-基底动脉系统血管闭塞引起病人的表现哪项不是（）。
A.共济失调
B.吞咽困难
C.发音困难
D.视觉障碍
参考答案：D
压滤脱水
It was a pity that the great scientist died his research unfinished.
A．for
B．with
C．from
D．of
