China has invested 15.2 billion yuan so far this year to support pig keepers, in a(n) to
China has invested 15.2 billion yuan so far this year to support pig keepers, in a(n) to
发布时间：2020-08-16 09:55:56
China has invested 15.2 billion yuan so far this year to support pig keepers, in a(n) to ensure enough pig supplies. A. contribution B. effort C. promise D. purpose
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A. contribution (答案→)B. effort C. promise D. purpose 解析：可联系答.案.网客服索取。