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 Sir/Madam，

    POP CLUB attract me deeply. I'm Tom, coming from American and studying Chinese literature now. I like music very much. I have a good voice, that I feel very proud of. And I am good at play the guitar. In addition, I have great sense of team spirit. I think I am the one you want to.

    I would appreciate it if I could be accept. I can show my talent, improve my speaking Chinese and make many Chinese friend there. Moreover, I will try my better to make contributions to the club.If you think I'm suitable, please inform me by writing to tom 101@hotmail.com. Thank you for your consideration.

    University of Oxford is the oldest university in the English-speaking world and it's one of the top universities in the world. There is no clear date when the university started, but teaching began at Oxford in some forms in 1096 and developed quickly from 1167.
    There are 39 independent（独立的）colleges at Oxford, attracting students and learned men from across the world. There are over 100 libraries for the students and learned men to use. At University of Oxford, they also provide a number of money for the best students. Of course, if you want to study here, first you have to reach a certain level of English language.
    College life at Oxford is very exciting but busy. The groups of college provide a friendly and welcoming home for students while the colleges are strict with students about their studies. Many Chinese students are studying here. The number of Chinese students at the university has grown quickly over the past 10 years.
根据短文内容，选择最佳答案。

如图所示，大小相同的摆球a和b的质量分别为m和3m，摆长相同，并排悬挂，平衡时两球刚好接触，现将摆球a向左边拉开一小角度后释放，若两球的碰撞是弹性的，下列判断中正确的是（   ）

某市百货大楼服装柜在销售中发现：“七彩”牌童装平均每天可售出20件，每件盈利40元．为了迎接元旦，商场决定采取适当的降价措施，扩大销售量，增加盈利，尽量减少库存．经市场调查发现：如果每件童装降价1元，那么平均每天就可多售出2件．要想平均每天销售这种童装盈利1200元，那么每件童装应降价多少元？