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Directions: Complete the following dialogues, using the words and phrases in brackets. Make changes or additions where necessary.A: Why isn't it easy to solve the water problem?B: Because water is far ________than energy. No other ___________can _______water, so it is impossible to find an __________it. Besides, water demand is rising, but water supply is fluctuating as a result of climate change. (resource, complicated, alternative, replace)
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Directions: Complete the following dialogues, using the words and phrases in brackets. Make changes or additions where necessary.A: Why is it important for us to conserve water?B: Water is going to be the most contentious ______of the 21st century. It will trigger geopolitical ______. That's why water ________is not only _________our economy but also a task of _______importance. (conservation, in the interest of, conflict, strategic, resource)
表现为瞳孔放大,面颊泛红,搓手,轻松地跳跃是属于( )
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头部姿势传递信息中,头部向前一般表示( )
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