题目

阅读下面材料，在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。A lecturer was giving a lecture to his students on stress management. He raised a glass of water and asked the audience, “How heavy do you think this glass of water is？” The students' answers ranged from 20g to 500g. It doesn't matter on the absolute 【1】 (weigh). It depends on how long you hold 【2】 . If I hold it for a minute, it is OK. If I hold it for an hour, I'll have 【3】 ache in my right arm. If I hold it for a day, you will have to call an ambulance. It's ex读图，回答下列问题。（1）水资源在自然资源中属于____________（可再生、不可再生）资源，我们通常所说的水资源是指陆地上的____________资源，主要来自____________（2）我国水资源总量居世界第____________位，从图甲中可以看出我国人均水量___________（高于、低于）世界人均水量，北京位于我国径流带中的____________带。（3）结合图乙，长江流域及以南的地区河川径流量约占全国的____________%，但面积约占全国的____________%。