大学英语大学英语大学英语专业四级TEST FOR ENGLISH MAJORS (2009)&-GRADE FOUR-
题目内容

What is the purpose of the national survey、

2024-07-09

A.To collect data on sources of pollution.

B.To identify pollution in rivers and lakes.

C.To help control environmental pollution.

D.To help control industrial wastes.

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