题目

Where are the speakers?A. At a travel agency. B. At a post office. C. At a bank. 答案：【答案】B【解析】此题为听力题，解析略。下列估测值中，最接近实际的是                                             (     )A.成年人正常的步行速度约为5m/s       B.适合人们洗澡的热水温度约为70℃C.我们的物理教科书的质量大约是90kg    D.教室门的高度约为2m