可出现爆米花样钙化的是（）
A.结核球
B.错构瘤
C.矽肺
D.胸膜间皮瘤
E.肺癌
参考答案：B
属于先天性运动功能障碍的是（）
A.脑膜炎
B.臂丛神经损伤
C.急性脊髓灰质炎
D.颅脑损伤
E.脊柱裂
A fire in a ballast pumproom can be brought under control with minimal impact on stability by（）.
A.cooling the outside bulkheads with water
B.shutting all sources of air into the compartment
C.closing the sea chest
D.flooding the compartment with salt water
