水火共制法有（）
A.炙
B.蒸
C.淬
D.潬
E.煨
参考答案：B, C, D
________advertisements, TV programs are often made boring.[ ]
A. Regularly interrupted by
B. Regularly interrupting
C. To regularly interrupt
D. To be regularly interrupted by
2，6，12，20，30，42，( )。
A．56B．61C．69D．76
