下列哪些疾病可有基底节钙化表现（）
A.一氧化碳中毒
B.甲状旁腺功能减低
C.弓形体病
D.先天愚型
E.结节性硬化
参考答案：A, B, C, D, E
Having been trapped in the coal mine for seven days,the miners at last．[ ]
A．are rescued
B．were rescued
C．would be rescued
D．had been rescued
请描述功率控制的类型和作用。
