第2题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. She doubts he makes much money now. B. She’s surprised that he had chosen that company. C. She doesn’t know when her classes started. D. She wonders why he’s kept his job. 参考答案:D 答案解析:[听力原文] M: Carl earned a lot of money over the summer vacation as a consultant to that company.
第12题: [单项选择]为了便于软件的维护,程序应具有清晰的结构和良好的风格,下面关于编程风格的叙述中不可取的是 ( ) A. 使用有意义的标识符 B. 尽可能对代码进行优化 C. 不要进行浮点数的相等比较 D. 应该包含有适量的注释 参考答案:B 答案解析:[解析] 一般情况下,我们在给变量命名的时候,都希望能够使用有意义的变量名。由于存在NaN的不寻常比较行为和在几乎所有浮点计算中都不可避免地会出现舍入误差,解释浮点值的比较运算符的结果比较麻烦。最好完