【单选题】Which of the following demand functions represents a price elasticity of demand equal to -0.33 and an income elasticity of demand equal to 0.8 at all points along the curve?
【判断题】采用远期信用证付款时下列规定方法是正确的:“The Buyer shall open through a bank acceptable to the Seller an Irrevocable Sight Letter of Credit to reach us before 25th June 2002,valid for negotiation in China until the 15th...