题目

What is the man doing?A. Making a phone call. B. Making a visit. C. Making an appointment. 答案：【答案】B【解析】M: Good afternoon. I’m Robert Anderson. I have an appointment with Mrs. Brown. Is she in? W: Yes, she is. She’s waiting for you in her office. Please come in.此题为听力题，解析略。一物体由静止沿光滑斜面匀加速下滑距离为L时，速度为v，当它的速度是时，它沿斜面下滑的距离是 [     ]A． B． C． D．