为进一步明确诊断，首选辅助检查是
A．头颅MRI
B．脑电图
C．腰穿脑脊液检查
D．DSA脑血管造影
E．头颅CT
参考答案：A
_____ his overcoat, the manager went out immediately.
A．Worn in
B．Dressed
C．Helped into
D．Put on
反击式碎煤机产量明显下降的原因及处理。
