第31题: [单项选择]下列哪个选项不能提高程序的性能 A. 1 5 B. 12 7 C. a b D. 10 25 参考答案:B 答案解析:本题考查的是For循环结构语句,现在看程序段是如何运行的: 开始a=1,b=1。For循环中步长缺省值为l,循环变量1的初值为1,终值为3,所以此循环结构可以循环3次。 第一次循环后,结果为:f=2,
第35题: [单项选择]Passage Three Questions 32 to 35 are based on the passage you have just heard.A. An engine room. B. A big kitchen. C. A great theatre. D. A high building. 参考答案:C 答案解析:[解析] What does the giant jet look like inside