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请根据教材第一课“香蕉的故事”课文内容，回答问题：这位丈夫和他的同事们为什么到处找香蕉？当时在西安买得到吗？
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更多“请根据教材第一课“香蕉的故事”课文内容，回答问题：这位丈夫和…”相关的问题
B．根据课文内容在每个空白处填入一个恰当的词。
Two men walked slowly, one after another, through the shallow water of a stream. 61 they could see were stones and earth. The 62 ran cold over their feet. They had blanket packs 63 their backs. Suddenly, the man who followed 64 over a stone. He hurt his foot badly and called: “Hey, Bill, I’ve hurt my foot.” Bill 65 straight on without looking back. The man was 66 in the empty land, but he was not lost. He knew the way to their camp, where he would find food and bullets. He struggled to his 67 and limped on. Bill would be waiting for him there, and 68 they would go south to the Hudson Bay Company. He had not eaten for days. Often he 69 to pick some small berries and put them into his 70. The berries were tasteless, and did not satisfy, but he knew he must eat them.
根据教材附表一中的相关数据主考虑电势图N2-HN4+,(aq)-NH;(aq)在酸性溶液中Eθ(N2/HN3)和Eθ(HN3/NH4+).写出HN3(aq)的岐化反应方程,计算25℃下该反应的标准平衡常数Kθ并评价NH3(aq)的稳定性.
表5一1(即教材第147页的表5―2)是一张关于短期生产函数
的产量表：
表5一1短期生产的产量表
(1)在表中填空。
(2)根据(1)，在一张坐标图上作出TPL曲线，在另一张坐标图上作出APL曲线和MPL曲线。(提示：为了便于作图与比较，TPL曲线图的纵坐标的刻度单位大于APL曲线图和MPL曲线图。)
(3)根据(1)，并假定劳动的价格w=200，完成下面相应的短期成本表，即表5一2(即教材第147页的表5一3)。
表5-2短期生产的成本表
(4)根据表5一2， 在一张坐标图上作出TVC曲线， 在另一张坐标图上作出AVC曲线和MC曲线。(提示：为了便于作图与比较，TVC曲线图的纵坐标的单位刻度大于AVC曲线图和MC曲线图。)
(5)根据(2)、(4)，说明短期生产曲线和短期成本曲线之间的关系。
