A poor farmer had a friend who was famous for the wonderful apples he grew. One day， his friend gave him a young apple tree and told him to take it home and 1 it.

    Seeing the gift， the farmer was very happy， and he thought he would also have a lot of wonderful apples， but when he got home， he felt 2 . He did not know where to plant it. He thought over and over and considered every place he could think of. 3 ， he decided to plant the tree in his woods. There were many high trees with thick leaves in the woods. With those trees around ，no one else could see the young apple tree. He even felt proud of himself for finding so secret a place for the apple tree. Every day he went to take care of the tree， watering it. To his surprise and 4， the apple tree didn't grow as well as he expected.  It died without sunlight and good soil.

    Later the friend asked the farmer why he had planted the tree in such a 5place. "What's the difference?" the farmer said angrily. "If I had planted the tree near the6， passers-by(行人) would have stolen the fruit. If I had planted the tree in one of my fields， my neighbors would have come at night and 7 some of the apples! If I had planted it near my house， my own children would have taken the fruits. No matter where I plant the tree， I can't have8 to enjoy the apples： So there is no difference where I planted it."

    "Yes，" said the friend. "But sooner or later someone could have enjoyed the fruit. Now you not only have robbed(抢夺) everyone of the fruit， but also have 9 a good apple tree! You don't know the true meaning of 'share'!"

    We should learn to 10in our life. The more you want to own something all by yourself， the less you get at last.

一个梯形的上底长8cm，中位线长10cm，则其下底长为（　　）cm．

作文
题目：_________，感觉真好
感觉就是简单的心理过程。平时，当你帮助别人的时候，得到别人理解的时候，孝敬父母的时候，取得成功的时候……你的感觉往往是非常好的。请把题目补充完整然后写一篇作文。
要求：选好你要写的那一方面内容，填在题目的横线上。要写出亲身经历，写出自己真实的心理感受。以记叙为主，恰当运用议论、抒情等表达方式。

VitaminD佝偻病是位于X染色体的显性致病基因决定的一种遗传病，这种疾病的遗传特点之一是（   ）  

人体呼出的气体中氧气的含量多于二氧化碳的含量．（判断对错）