题目内容：
我国化学氮肥的当季利用率仅为30%-35%，氮肥的损失率可能为30%-50%。
A.正确
B.错误
参考答案：
选择题：我国化学氮肥的当季利用率仅为30%-35%，氮肥的损失率可能为30%-50%。
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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