题目内容
污染物进入人体的途径有表面吸附、吸收、生物浓缩等几种。
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环境问题包括环境污染和生态破坏。……………………（ ）
The city wall of Pingyao Ancient City is 46 kilometers. It is about 10 meters high and 3 to 6 meters wide on top.
The layout of the ancient city looks like a giant dragon because Chinese are the offspring of the dragon.
People in Pingyao wish the ancient city would be safe and secure for thousands of years just like the kylin.
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