铁塔、铁架桥属于( )结构。
A:薄壳
B:框架
C:实心
---- Excuse me, could you please tell me the way to the nearest hospital?
---- I'm sorry, _I am new here. You can ask the policeman over there.
以下关于实验的描述,正确的是( )
西汉初年,刘邦封置诸侯王国.封子弟为王,功臣为侯,并规定“非刘氏不王.非有功不侯”。这表明刘邦推行分封制意在( )