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 Jack，

    I'm sorry to hear that you feel lonely in the new school, because you find hard to make friends. Now, I'd like to offer you some advices. Firstly, it's normal of you to feel lonely because you are living in a new environment. Secondly, you should greet your classmates when met them on campus. Thirdly, it would be a good idea if you take an actively part in class activities, what can help them learn more about you. I believe you will be able to make new friends soon unless you're friendly to the others.

    I hope the above suggestions will be helpful to you or everything will be fine with you in the future.

Yours，

Li Hua

下列各组分子中，都属于含有极性键的非极性分子的是（　　）

内蒙古自治区认真贯彻党和国家政策，编译出版各类蒙古文教材及教辅资料1000余种；完成了蒙古文版中小学教学资源开发建设任务；实现了民族教育的义务教育阶段全面免费。这些举措（　　）

①有利于维护民族平等、团结、互助、和谐的社会主义新型民族关系

②体现了民族平等、团结、共同繁荣的原则

③能够消除地区差别，实现民族融合

④有利于少数民族文化的传承发展。

某化学兴趣小组为探究元素性质的递变规律，设计了如下系列实验．

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