正常成人在清醒、安静和闭眼放松情况下，ECG枕部和顶部主要为()
A．α波
B．β波
C．θ波
D．δ波
参考答案：A
The number of people invited to the party ____ fifty, but a number of them ____ absent for different reasons.
A．were; was
B．was; was
C．was; were
D．were; were
默罕默德阿里改革增强埃及的国力，主要是因为他采取了（）
A.政治民主化措施
B.缓和了与英法的关系
C.经济改革和军事改革壮大实力，相对于亚洲和北非国家力量增强
D.对外战争掠夺了大量领土
