题目内容：
Questions 13 to 15 are based on the conversation you have just heard.
A．Bad weather. B．Human error.
C．Breakdown of the engines.
D．Failure of the communications system.
参考答案：
答案解析：
单选题：Questions 13 to 15 are based on the conversation you have j
- 题目分类：英语六级
- 题目类型：单选题
- 查看权限：VIP
B．Human error.
C．Breakdown of the engines.
D．Failure of the communications system.