读“世界某区域示意图”，回答下列各题。

已知f（x）=a^x﹣2，g（x）=log_a|x|（a＞0且a≠1），若f（4）•g（﹣4）＜0，则y=f（x），y=g（x）在同一坐标系内的大致图象是（   ）

阅读下面短文，在答题卡相应位置处填入1个适当的单词或括号内单词的正确形式。

    “Traveling to China seems like traveling to another world. Its many famous scenic attractions impressed me ____ (great),”an American said. The following is ____ he wrote on his website.

    My friends and I had a family visit in Xi'an,____ old city with a long history in China. The hosts were retired or stayed at home without a job, and they were friendly to ____ (visit) from different countries coming their homes.

    We ____(taste) the true home-cooked dishes in the home of the family that we visited. For in-homing dinner, the host would prepare a list of menus in advance (提前). Our tour guide asked ____ (we) for advice about the food, so the host would try to cook what we wanted ____ (eat) at his home. We just enjoyed the locally cooked dishes. It was quite a different and exciting experience.

    Many foreigners enjoy ____ (learn) how to make Chinese dumplings. We were also ____ (offer) a general cooking class in the local family. The host taught us to make dumplings step by step with lots of patience. And we didn't need to pay any money ____this. Travel China Guide offers this kind of service free of charge.

    The family visit in Xi'an was a good chance for us to get to know Chinese people's daily life.

要“着力解决新生代农民工问题”。 “新生代农民工” 这个词，是党及国务院的文件（《中共中央、国务院关于加大统筹城乡发展力度，进一步夯实农业农村发展基础的若干意见》）中第一次使用，它传递出中央对约占农民工总数60％的80后、90后农民工的高度关切。对此认识正确的是
①党坚持立党为公、执政为民，全心全意为人民服务的宗旨
②政府履行国家职能，是人民利益的执行者和捍卫者
③充分反映了人民民主的真实性  ④我国是人民民主专政的国家，本质是人民

下列关于DNA和RNA的叙述中，正确的是（     ）