如图1所示为探究物体运动加速度与物体质量，物体受力关系的实验装置，砂和砂桶质量用m表示，小车和车上所加砝码总质量用M表示，小车运动加速度用a表示．

增加:在缺词处加一个漏字符号(/\),并在其下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线，并在该词下面写出修改后的词。

注意:1）每处错误及其修改均仅限一词:

2）只允许修改10处，多者(从第11处起)不计分。

Dear Ginni,

    How are you getting on these days?

    I wonder if you could sell some Chinese knots (结)for me. I make them myself with red silk thread, cloth and some other materials. They look real beautiful in the shape of a diamond, about 5 inches long or 4 inches wide. In China, this knots stand for friendship, love and good lucky. People can either give them as gifts friends or hang them in their houses. They are only 12.99 dollars every.

      If anyone wants to know more about knots, let them write to me. Also, do let me know if you are need further information.

    Thank you !

Zhang Lin

肯尼亚首都内罗毕，气候十分宜人，全年降水有两个峰值，分为长雨季和短雨季。肯尼亚的鲜花种植历史悠久，目前其鲜花已经占领了31 %欧洲鲜花市场。读下面尼亚位置示意图和内罗毕各月均温统 计表，完成下列各题。