下列程序段执行后的结果是？ string s = new string( "world!" ); system.out.println( s.length() );
if the equlibrium price of gasoline is $1.00 per gallon and the government places a price ceiling on gasoline of $1.50 per gallon, the result will be a shortage of gasoline
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张謇的经济实践主要包括：塑造产业树、构建 、门类多角化、功能立体式等方面。
a monopolist sells in two markets. the demand curve for her product is given by p1 = 303-3*x1 in the first market and p2 = 253-5*x2 in the second market, where xi is the quantity sold in market i and pi is the price charged in market i. she has a constant marginal cost of production, c = 3; and no fixed costs. she can charge different prices in the two markets. what is the profit-maximizing combination of quantities for this monopolist?