单项选择题 运用比较法估价,首先需要拥有大量真实、可靠的交易实例。( )

未知题型 研究人员发现在持续6分钟的测试中,不行组的人比按摩组的人走的更远,能比后者多走17.6%,研究者认为身体适度受损的中风幸存者仅通过简单廉价的运动就能获得更有效的效果。以下哪项如果为真，最能削弱上述论证?A、步行组的平均年龄为72岁，按摩组的平均年龄为65岁B、与按摩组相比，体制的改善使得步行组中风幸存者生活质量更高C、步行组中风幸存者还服用了相关治疗药物，按摩组停服了相关药物D、研究证明，对身体严重受损的中风幸存者来说，接受按摩的效果更佳

未知题型 听力原文：MA Hello, I'm calling because I need to rent a table saw. Do you do that sort of thing?WA Yes, we do. Do you want me to reserve one for you? It's thirty-five dollars per day, with a two-hundred dollar deposit. You'll need a major credit card and a photo ID when you come pick it up. And the saw's due back no later than twenty-four hours after you pick it up.MA Okay, that sounds good. I'd like to reserve one for one day. I'll be in to pick it up at five p.m.WA Okay, now if you'll just give me a minute, I'll pull up the form. on the computer.Where does this conversation take place?A．In an officeB．On the phoneC．At a hardware storeD．At a construction site