【单选题】听力原文:M: Did you know that astronauts have made commercial products in space? W: No, I wasn't aware of that. What kind of products? M: Tiny plastic beads with a little hole through it. W: Tiny balls? D...
【单选题】听力原文: M: Did you know that astronauts have made commercial products in space? W: No. I wasn't aware of that. What kind of products? M: Tiny plastic beads. W: Beads? Do you mean to tell me that astrona...