突出矿井井下进行电焊、气焊和喷灯焊接时，必须停止突出煤层的掘进、回采、钻孔、支护以及其他所有扰动突出煤层的作业。
参考答案：对
— Do you know ______ he has done with the money?
— He has bought a new house in a garden district. [ ]
A. how
B. when
C. what
D. where
确定AVM治疗方法及大小、部位、最有用方法是
A．腰穿为血性脑脊液B．CT扫描示高密度畸形血管团C．MRI示T1，T2加权象均呈黑影D．全脑血管造影显示E．γ刀
