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A problem with OLEDs.
A.
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听力原文：A: Tell me about this new cleaner please. Can it be used to clean metal?B: Yes, on certain kinds. It's very good on aluminum and brass.A: Aluminum and brass. I see. What about other metals? Can it be used with silver?B: Well, it's not really very good with silver. We have a special cleaner for silver.A: Oh. And what about enamel surfaces, like on a bathtub, for example.B: Yes, it works weft on enamel.A: And what about on things like floor tiles?B: Yes, it's perfect for floor tiles. It really takes off tough stains and marks. But it's not good for cleaning wooden floors or wooden surfaces. It might even damage them.A: How about plastic?B: Plastic's fine. No trouble at all.A: Good, then I'll take two cans, please.?Look at the note below.?You will hear a talk about a cleaner. Cleaner Message1 It's very good on aluminum and (9) , but not very good with (10) 2 It works well on enamel, it's perfect for floor tiles. But it's not good for (11) floors however, (12) is fine.