橄榄-脑桥-小脑变性常见的首发症状()
A.核上性眼肌麻痹
B.不自主运动
C.双下肢共济失调
D.吞咽困难
E.双上肢共济失调
参考答案:C
Last night Mr. Crook didn’t come back at the usual time. ____, he met some
friends and stayed out until midnight.
A. Meanwhile
B. However
C. Instead
D. Yet
激活的PKC能磷酸化的氨基酸残基是()
A.酪氨酸/丝氨酸
B.酪氨酸/苏氨酸
C.丝氨酸/苏氨酸
D.丝氨酸/组氨酸
E.苏氨酸/组氨酸