•Look at the note below. •You will hear a talk about a cleaner. Cleaner Mess

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问题 •Look at the note below.
•You will hear a talk about a cleaner.
                                                    Cleaner Message
1  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.
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.

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答案brass

解析 由“It’s very good on aluminum and brass.”可知。aluminum,铝。
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