十三朝古都是指？有哪十三朝？该城的历史?

《资治通鉴》记载：“国家本置中书、门下以相监察，中书诏敕或有差失，则门下当行驳正。”材料涉及的政治制度(　　)

A．确立于秦朝，汉武帝时期完善

B．标志着君主专制制度达到顶峰

C．削弱了君权，突出了臣下的作用

D．有利于减少决策失误

It              be my cap.  Look, it has my name            _ it.       [ ]

A. must; on    

B. can; in    

C. must; in    

D. can; on

Big Cheese Chairs (BCC) manufactures and sells executive leather chairs. They are considering a new design of massaging chair to launch into the competitive market in which they operate.They have carried out an investigation in the market and using a target costing system have targeted a competitive selling price of $120 for the chair. BCC wants a margin on selling price of 20% (ignoring any overheads).The frame and massage mechanism will be bought in for $51 per chair and BCC will upholster it in leather and assemble it ready for despatch.Leather costs $10 per metre and two metres are needed for a complete chair although 20% of all leather is wasted in the upholstery process.The upholstery and assembly process will be subject to a learning effect as the workers get used to the new design. BCC estimates that the first chair will take two hours to prepare but this will be subject to a learning rate (LR) of 95%. The learning improvement will stop once 128 chairs have been made and the time for the 128th chair will be the time for all subsequent chairs. The cost of labour is $15 per hour.The learning formula is shown on the formula sheet and at the 95% learning rate the value of b is –0·074000581.Required:

(b) Assuming that a cost gap for the chair exists suggest four ways in which it could be closed. (6 marks)The production manager denies any claims that a cost gap exists and has stated that the cost of the 128th chair will be low enough to yield the required margin.

下列诗歌中属于欧阳修的代表作有（）。

A．《戏答元珍》

B．《东溪》

C．《奉酬公素学士见招之作》

D．《山园小梅》

过量空气系数