____是长方形，____是正方形，____是圆，

____是三角形，____是平行四边形。

读我国分界线示意图，回答下列问题。

氘核、氚核、中子、氦核的质量分别是m₁、m₂、m₃和m₄，如果氘核和氚核结合生成氦核，则下列说法中正确的是（   ）

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：在错的词下画一横线，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。

    My name is Lihua, who is Senior 3 student from Xing Guang Middle School. Every day I have to get up on 6:10 am, when much people are still sleeping. I'm busy with my studies because I have a lot of homework to do, which make me feel under great pressure. English is the subject in that I'm interested. When I feel stressing, I'll turn to my best friend Mike for help. We have been best friend since we are very young. Whenever I'm in trouble, he will cheer him up. Now I'm trying my hard to prepare for the college entrance examination. I hope to be admitted into Zhejiang University.