题目内容

Chemical pollution will bring about a threat to agriculture and food chain, and ________ to human health.
A．frequentlyB．significantlyC．steadilyD．consequently
D
副词辨析。A频繁地；N重要地；C稳定地；D所以，因而，因此；结合句意可知D正确。句意：化学污染给农业和食物链产生很大的威胁，因而对人类的健康也会有很大的威胁。
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