正常成人睡眠脑电图,思睡期的低-中波幅θ活动的频率是()。
A.1~3Hz
B.3~5Hz
C.5~7Hz
D.7~9Hz
E.9~11Hz
参考答案:D
He said that he ________ speak a little English when he was seven.[ ]
A. might
B. would
C. could
D. can
丙酮酸羧化支路中的丙酮酸羧化酶,需下列化合物中除哪个以外的所有辅助因子:()
A.生物素
B.Mg2+
C.ATP
D.草酰乙酸