搜题
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第1题

- Good morning, John . How are you doing? - _________ A：I’m pleased. B：Good night. C：Not so bad. And you?
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第2题

- How do I get to the cinema? - _________ A：It.s very far. B：Yes, there is a cinema near here. C：It.s well k
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第3题

- This is a challenging job. Who wants it? - _________ A：I.ll take it. B：It.s a good idea. C：
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第4题

【问答题】简述等产量曲线的含义及特点。
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