表示
Jim’s job is to keep his boss _____ of the latest development of that product in Europe.
Jim’s job is to keep his boss \_\_\_\__ of the latest development of that product in Europe.
I would ask for a special meeting if I _____ her.
I would ask for a special meeting if I \_\_\_\__ her.
假定某厂商的需求曲线为Q=10000-100P，其中，Q为产量，P为价格，用元表示。厂商的平均成本函数为AC=30000/Q+50。求厂商利润最大化的产量与价格是多少？最大化利润水平是多高？
假定某厂商的需求曲线为Q=10000-100P，其中，Q为产量，P为价格，用元表示。厂商的平均成本函数为AC=30000/Q+50。求厂商利润最大化的产量与价格是多少？最大化利润水平是多高？ 解：已知，Q=10000-100P，于是，P=100-1/100Q，则：TR=P·Q=（100-1/100Q）·Q=100Q-（1/100）Q2，MR=dTR/dQ=100-（1/50）Q。又已知，AC=30
I regret _____ you that your application has been refused.
I regret \_\_\_\__ you that your application has been refused.
Something must have happened on their way. Or they _____ by now.
Something must have happened on their way. Or they \_\_\_\__ by now.
某种商品进行有奖销售，每购买一件有的中奖概率。现某人购买了20件该商品，用随机变量X表示中奖次数，则X的分布为（）
某种商品进行有奖销售，每购买一件有的中奖概率。现某人购买了20件该商品，用随机变量X表示中奖次数，则X的分布为（）D
