[单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. The house is on fire. B. They are bothered by the smoke. C. There is no breeze in the room. D. They are not allowed to stay in the room.
参考答案:B 答案解析:[听力原文]
W: It’s full of smoke here. I can hardly breathe.
M: It must be from the next room. It’s th
第5题: [多项选择]概念一般都涉及以下哪些要素（） A. 符号 B. 名称 C. 内涵 D. 外延 E. 结构 参考答案:B, C, D 答案解析:概念一般都涉及以下要素：第一，名称，即代表概念的词语、符号。第二，内涵，即这类事物所共有的关键特征。第三，外延，即这一概念所代表的具体事物（实例）的范围。因此，答案选BCD。
