话说当年西楚霸王项羽行军至乌江，天色已晚，只见岸边沙滩上有几个由蚂蚁围成的大字“霸王死于此”．项羽心想：这是天意，遂大喊一声：“天绝我也!”即拔剑自刎．其实，这是刘邦手下的军师用蜜糖写的几个大字，招来许多蚂蚁，顶羽不知是计，中计身亡．请你分析回答：

如图中，图1为胰腺分泌活动的调节示意图．图2是图1的局部放大图，1﹣5代表特定的结构或物质．图3是胰岛的示意图．图4 是图3 的局部放大图，6﹣9 代表不同的液体．请据图回答问题：

（1 ）当食物进入胃后，扩张胃体，通过反射，作用于胰腺，直接刺激胰腺的外分泌部分泌胰液，该反射为____ 反射，效应器是____ ．当神经冲动传导到图 2 中的突触小体时，引发____ 融合，释放神经递质．这种方式释放神经递质，相对于其它跨膜运输其意义在于____ 

（2）除上述（1）调节方式外，胰液的分泌还受到小肠粘膜分泌的____ 的调节．因此胰液分泌受神经和体液的双重调节，以____ 为主．

（3 ）图 3 中胰岛 A 细胞和胰岛B 细胞分泌的激素能有效地调节血糖浓度，其中胰岛B细胞分泌的激素的作用是____．若图 4 中血液的流动方向为10→8，则饭后5小时，8处的胰高血糖素浓度____ （填“大于”“等于”“小于”）10处．

（4 ）糖尿病有多种类型，其中，Ⅰ型糖尿病人体内胰岛素偏低，Ⅱ型糖尿病人体内胰岛素水平正常或偏高．推测Ⅱ型糖尿病的直接原因最可能是____

Behind each door_____ you open are chances to learn new things.

完形填空。阅读下列短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。

    Last Sunday, I sat with Tony, my college classmate, in a well-known coffee shop in Buenos Aires, Argentina. As we1our coffee, two men entered and sat on an empty table beside us.

    They2the waiter and ordered three cups of 3, two on the table and one on the wall. We heard this order with great4and observed that they were served with two cups of coffee 5they paid for three. As soon as they6, the waiter pasted (粘贴) a piece of paper on the wall saying A Cup of Coffee.

    It 7that the matter was normal at this place. However, it was something8for Tony and me. Since we had nothing to do with the matter, we 9our coffee, paid the bill and left.

    After a few days, we again had a10to go to this coffee shop. While we were enjoying our coffee, a man entered. The way this man was dressed did not  11the standard nor the atmosphere of this coffee shop. Poverty was12from the looks on his face. As he13himself, he looked at the14and said, “One cup of coffee from the wall.” The waiter served coffee to this man with15, politeness and warmth.

    After a few minutes, the man finished his coffee and left16paying. We were amazed to watch all this when the waiter 17a piece of paper from the wall and18it in the dustbin.

    Now it was no 19for us because the matter was very clear. Although the man didn't know about the one who was giving this cup of coffee to him, he would have a better understanding of the wall which had a great role between the 20and receiver.