题目内容：
Increasing water shortages prove to be the biggest obstacle to boosting theworld’s grain production.
参考答案：
答案解析：
单选题：Increasing water shortages prove to be the biggest obstacle
- 题目分类：英语四级
- 题目类型：单选题
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甲公司在纸手帕等纸制产品上注册了“茉莉花”文字及图形商标。根据商标法律制度的规定，下列未经许可的行为中，构成侵权的有（ ）。A．乙公司在其制造的纸手帕包装上突
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