增加：把缺词处加个漏字符号（∧），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l1处起）不计分。

    Smart-phone apps certainly make our life easier. And now, it look like they could even do our homework for us. Recent years have seen the release of a variety of study aid apps aimed at student. Most of these apps allow users take a photo of our schoolwork and the correct answers will just appear on their smart-phones. Although they are conveniently, these apps present problems to both parents but teachers. Most students just copy the answers from the app, while only a few use the app to study. Better still, some students even use the study aid apps as social networks. But, this isn't to say that study aid apps should be completely banned. Parents and teachers should give necessary guidance to help students take the advantage of the study aid apps' strengths and avoiding their weaknesses.

下列句中划线的词语使用恰当的一句是   （       ）

按要求回答下列问题：

（1）的名称为　____ ；

（2）的名称为____ ；

（3）2，4﹣二氯甲苯的结构简式为　____ 　；

（4）某物质结构如右图所示，分子式为____ ；该物质可以与下列____ （填序号）发生反应．

A．KMnO₄酸性溶液        B．氢气        C．溴水       D．NaOH溶液

（5）中含有的官能团的名称为____ ，____ ．

（6）在戊烷的各种同分异构体中，核磁共振氢谱只有一个吸收峰的结构简式为　____ 　．