[单项选择]分别执行ADD AX，1和INC AX指令后，AX寄存器中将会得到同样的结果，但是在执行速度和占用内存空间方面存在差别，说法正确的是 ( )
A. ADD AX，1指令比INC AX指令执行速度快，而且占用较小的内存空间
B. ADD AX，1指令比INC AX指令执行速度慢，而且占用较大的内存空间
C. ADD AX，1指令比INC AX指令执行速度快，而占用的内存空间却较大
D. ADD AX，1指令比INC AX指令执行速度慢，而占用的内存空间却较小

Although general Motors and General Electric are large multinational companies with operations around the globe，there are numerous smaller companies that engage in international trade．Because 95percent of the world’s population and two-thirds of its (21)_____ power are located outside the United States，it is important for American (22)_____to be present in foreign markets．However，before we explain the different methods by which a company may (23)_____in international trade，we might first consider some important (24)_____that U.S．companies often fail to study before they sell products in a foreign country．These factors are (25)_____with differences in language，in values and attitudes，and in political (26)_____． When (27)_____Coca-Cola into the Chinese market in 1920，the company used a group of Chinese symbols that，when spoken，sounded like Coca-Cola．However，when read， these symbols meant，“a female horse fattened with wax”．Upon reentering the Chinese market in the