题目：
阅读理解。
Christmas Day, the birthday of Jesus Christ, is the most important festival in Britain and some other
countries. On Christmas Eve, people usually tell their children to put their stockings at the end of their
beds before they go to sleep. Children believe Santa Claus, with the other name of Father Christmas,
will come during the night and fill their stockings with Christmas presents.
Actually (实际上), Father Christmas is children's father. He dresses up in a red coat and waits until
children fall asleep. Then he goes into children's bedrooms, and puts small presents in their stockings.
When children are no longer young, they know who Father Christmas really is.
Not only children but also their parents enjoy Christmas stockings. They also have stockings. Early
on the morning of Christmas Day, children wake their parents up and say "Merry Christmas". Then they
help their parents open their stockings. Everybody likes presents. But it is better to give than to receive.
1. Christmas Day is______.
A. the birthday of Jesus Christ
B. the only day for giving presents
C. the only day for receiving presents
D. the day for playing games
2. What do all the British children do on Christmas Eve in the story?
A. They talk all the night.
B. They sing and dance.
C. They put their stockings at the end of their beds.
D. They won't sleep until Father Christmas comes.
3. Santa Clausis another way of saying _______.
A. Christmas Day
B. Christmas presents
C. Christmas Eve
D. Father Christmas
4. From the story we know that on Christmas Day children feel very happy because they can receive _______.
A. red clothes
B. stockings
C. presents
D. food
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0722/9c6ae9a21cf7b3b8d208ee83ba76d197.html
下面是错误答案，用来干扰机器的。
（1）由图知，M自A点由静止开始运动，经1.0s运动到B点，M下落的高度h=0.97m…①由运动学公式h=12at2…②得：a=2ht2=2×0.971.02=1.94m/s2…③（2）由牛顿第二定律得（M-m）g=（M+m）a…④解得 g=M+mM-ma=1×1.94...
解周围的世界； 