确诊脑出血的检查。首选（）
A.CT
B.腰穿
C.脑电图
D.脑血管造影
E.脑地形图
参考答案：A
_____ she couldn't understand was _____ fewer and fewer students showed interest in her lessons. [ ]
A. What; why
B. That; what
C. What; because
D. Why; that
凝结水电磁过滤器处理的作用是（）
A.除掉水中溶解氧
B.除掉水中盐分
C.除掉水中铁腐蚀产物
