在以下几种职业的人群中，咽炎的发病率较高的是（ ）
A．园林工人
B．林区居民
C．公务员
D．交通警察
A、绿色植物是自动的“空气净化器”，能吸附空气中的有害的气体或是粉尘，能够使得空气变得清新，所以园林工人不易得呼吸系统疾病，A错误．
B、绿色植物是自动的“空气净化器”，能吸附空气中的有害的气体或是粉尘，能够使得空气变得清新，所以林区居民不易得呼吸系统疾病，B错误；
C、公务员一般在室内，较少接触室外被污染较重的空气，所有不易得呼吸道疾病，C错误；
D、汽车尾气排放出大量的有毒气体和粉尘，交通警察处在交通的十字路口，吸入的气体中含有汽车尾气中的大量有毒气体或是粉尘，故易得呼吸系统疾病，D正确．
故选：D．
Many teenagers have hobbies. But sometimes these hobbies can get in the way of schoolwork, and parents might worry about their child’s success at school. Teenagers often think they should be allowed to practice their hobbies as much as they want. Do you agree? Liu Yu, a fifteen-year-old boy from Shandong, is a running star. He is on his school running team and has always wanted to be a professional athlete. 小题1:________________ “Of course we want to see Liu Yu achieve his dreams,” says Mr Liu, “and we know how much he loves running. That’s great, and my wife and I have watched him in every one of his races. 小题2:. ________________ But we do think that our son needs to be realistic. Now that he is getting older, he needs to think about what will happen小题3:. ________________.” Liu Yu doesn’t really agree. “Well, I think I should be allowed to make decisions for myself,” he says. “My parents have always taught me the importance of working hard and not just to do what I enjoy. I understand this. 小题4:. ________________ Being a professional runners is the only thing I have ever wanted to do.” Mr and Mrs Liu believe that Liu Yu should study hard in the evenings, and so they don’t allow him to practice running on school nights. “I know this seems strict,” says Mrs Liu, “but we think we’re doing the right thing. He has to understand that very few people can become professional athletes. It’s very difficult dream to achieve. We don’t allow him to practice every day 小题5:________________”
|