聚丙烯酸酯类涂料是目前市场上流行的墙面涂料之一，它具有弹性好、不易老化、耐擦洗、色泽亮丽等优点。聚丙烯酸酯的结构简式为
它属于( )
①无机化合物 ②有机化合物 ③高分子化合物 ④小分子化合物 ⑤混合物 ⑥共价化合物
A．①③④
B．①③⑤
C．②③⑤⑥
D．②③④
答案：C
从结构看，分子中含有碳元素，结构内含有酯基，一定属于有机物，且属于共价化合物，又因其有一定的聚合度，故一定是高分子化合物，且是混合物。
请阅读短文，掌握其大意，然后根据短文内容从下面方框中的七个选项中选出五个还原到短文中，使短文意思通顺、结构完整。（每小题2分） Newspapers are not nearly as popular today as they were in the past. 小题1: Most people read only the sports pages, the advice or the gossip（闲话，绯闻）columns, the comics, and perhaps the classified advertisements. Most people don't take the time to read the real news. 小题2: These techniques（技术，手段）are used on the front page because it is the first thing you see when you pick up the paper. The first page attracts attention and encourages the reader to look through the rest of the paper. 小题3: If the headline is horrible（恐惧的）enough or frightening enough or wild enough, perhaps they will go on to read the front page anymore. They may read the headlines, but that is all, then they turn to the sports page, or comics, or advertisements. It seems that people do not want the news from a newspaper anymore. 小题4: More people watch television news because it is easier and more interesting than reading a newspaper. What about you? Do you read news from a newspaper? 小题5: Or do you care about news at all? Would you mind if there were no news?
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