题目内容
如何改善变极距式电容传感器的非线性（ ）
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What are the key words that may sum up China's water problem?________and scarcity.
What are the sources of water pollution?The sources of pollution include manufacturing emissions, poorly treated sewage, industrial ____and agricultural ________.
What does the sentence "There has been a long-term buildup to this problem."in Para.4 mean?It means that the water problem did not happen ______; instead it resulted from our age-old practice of polluting water or wasting water in addition to natural contamination and natural ______.
What kind of solution to China's water problem does the author suggest?A sustainable, _________ solution.
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