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如 題.
Possible answer:
1. 住宅
2. 工商業活動所產生的固體廢物
3. third possible answer - My kid forgot
4.住宅及工商業活動所產生的固體廢物 (but no such answer from the list, but I checked from web (can't remember if government web or not, it's just said this but no exact which one has bigger number)...
Any parents know???
Thanks in advance.
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