单项选择题 管材表面超声波探伤的计量单位是（）。

单项选择题 听力原文：W: Hello. Officer Jones speaking.M: Well, I'd like to report a UFO sighting.W: A what? M: A UFO! When I was driving hone from a party three hours ago at 6:30, I saw this bright light overhead. It disappeared behind a hill, so 1 started driving toward where the UFO landed.W: Now, how do you know it was a UFO? Perhaps you only saw the lights of an airplane.M: Well if it was that, how do you explain 'the BEAST'?W: What do you mean, 'the BEAST'?M: Okay. I kept driving for about five minutes when suddenly, this giant, hairy creature jumped out in front of my car.W: Then what? M: Well, then, the beast picked up the front of my car and said, 'Get out of the car. I'm taking yon to my master!' Something like that.W: Wow? A hairy beast who can speak English?M: I'm not making this up. Then, the beast opened the car door, carried me on his shoulders to the UFO, and fiat's when I woke up alongside the road. The beast must lave knocked me out and left me there.W: Well, that's the best story I've heard all night, sir. Have you been taking any drugs or alcohol in the last 24 hours? You mentioned you went to a party.M: What? Well, I did have a few beers, but I’m telling the troth.W: Okay, okay. We have a great doctor that deals with THESE kinds of cases. Thank you for your story.(20)A．6:30 P.M.B．3:30 P.M.C．9:30 P.M.D．7:00 P.M.

单项选择题 A．The man needs to sec a doctor for some counseling.B．The man has been frightened by the UFO.C．The man shouldn't go to the party.D．The man has been hurt by the beast and needs to see a doctor.