阅读短文《燕子》，回答问题。
       一身乌黑光亮的羽毛，一对俊俏轻快的翅膀，加上剪刀似的尾巴，这就是活泼机灵的小燕子。
       二三月间，微风轻轻地吹拂着，毛毛细雨从天上洒落下来。千万条柔柳展开了鹅黄色的嫩叶。青的草，绿的叶，各色鲜艳的花，都像赶集似的聚拢来，形成了烂漫无比的春天。小燕子从南方赶来，为春光增添了许多生趣。
       在微风中，在阳光下，燕子斜着身子在天空中掠过，“唧”的一声，已由这边的稻田上，飞到了那边的柳树下了；还有几只横掠过湖面，剪尾或翼尖偶尔沾了一下水面，那小圆晕便一圈一圈地荡漾开去。
       几对燕子飞倦了，落在电线上休息。在蓝天的映衬下，电线杆之间连着的几痕细线，多么像五线谱哇。停着的燕子成了音符，谱出一支春天的赞歌。

当生物新陈代谢旺盛，生长迅速时，生物体内（  ）

阅读理解

	Chinese writer Mo Yan won the Nobel Prize in Literature in 2012. Mo, who was born in 1955 into a farmer's family in Gaomi County in Shandong Province, is the first Chinese national to win the Nobel Prize in Literature. In his early years, life was not easy and he experienced hunger（饥饿）. These things have influenced Mo Yan's later writings.
	60-year-old Park Geun-hye(朴槿惠)was elected（选举）the new President of South Korea in December, 2012. She becomes the country's first female head of state and her term will last five years from 2013. “I will become a president who puts people's living before anything else,” she told the cheering Peopl in central Seoul as she accepted her win. “I will keep my premises.”
	Barack Obama (born in Hopolulu, Hawaii in 1961), who was elected the 44th President of the United States in 2008, has been elected again to a second term, fighting against Republican chllenger Mitt Romney. Obama is a graduate of Columbia University and Harvard Law School. His father was from Kenya. And his mother was born in Wichits, Kansas.

一节新干电池的电压为 ____　伏，供电时将 ____能转化为 ____能．

一个多边形的外角和是它内角和的 $\frac{1}{4}$ ，求：