与常闭（动断）触点并联的指令是（） A.A B.AN C.ON D.O
题型：单项选择题
问题：
与常闭（动断）触点并联的指令是（）
A.A
B.AN
C.ON
D.O
题型：单项选择题
(a) Compute the liability to VAT of John Walsh for the VAT period November/December 2007.Note: Where necessary you should apportion expenses between qualifying and non qualifying activities, based on the ratio of taxable turnover to total turnover. You may assume that the turnover ratio for November/December is representative of annual turnover figures. (10 marks)
，π16这三个实数中，分数共有（）．