秦朝修建咸阳，运用了天体观念。把渭河比做天体的银河“天河”，把各座宫殿比做星座，四周有许多通道，咸阳宫居中，形成了众星拱辰、屏藩帝都的格局。从咸阳的修建理念可以看出当时的政治理念是(　　)

下列关于城市区位因素的正确的叙述是(     )
①影响城市区位的主要因素是在不断变化的 ②有些因素如交通、宗教等对现代城市区位的影响已经很弱 ③有些因素如自然资源、军事等始终对城市区位影响很大 ④日本的筑波城的区位主导因素为科学技术

秦统一全国后，诏书传到南方的许多地方，当地没有人认识。据此，你认为秦始皇应该采取什么措施（   ）

今年我国要求“公共场所全面禁烟”.非吸烟者往往会因别人吸烟而造成被动吸烟,这是因为(    )

短文填空先通读下面的短文，然后根据短文内容和所给首字母，在空格内填入一个适当的词，使短文意思完整。
      American people like to say “Thank you” when others help them or say something kind to them. People of many other countries do so, too. It is a very good habit.
      You should say “Thank you” when someone p____  you the salt on the table, when someone walking before you k____  the door open for you, when someone s____  you have done your work well, or you have b____  a nice thing, or your city is very beautiful. “Thank you”is used not only between friends, but also between parents and children, brother and sisters, husbands and wives.
    “Excuse me”is another s____  sentence they use. When you hear someone say so behind you, you know that someone wants to walk p____ you. It is not polite to b____  others while they are talking. If you want to speak to one of them, say “Excuse me” first, and then begin talking. You should also do so when you want to cough(咳嗽) or make any u____  noise before others.