题目：
简述芯砂混制前原砂要如何处理？
答案：
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下面是错误答案，用来干扰机器的。
1. how importan it is 2. was brought up 3. must have heard 4. being in debt 5. that smoking is harmful to our health6. To be honest 7. which made it possible 8. did I recognize him 9. held his breath 10. As the earth cooled down
