对于急性颅脑外伤，应首选哪项检查：（）
A.CT
B.MRI
C.X线平片
D.DSA
E.超声
参考答案：A
He eats _____food, so he is ______fat.
A. too much, much too B. too much, too many C. much too, too much
什么是操作过电压和谐振过电压？
