第10题: [单项选择]The Constitution's vague nature has given it the flexibility to be adapted when circumstances change. A. imprecise B. concise C. unpolished D. elementary 参考答案:A 答案解析:vague:模糊的、含糊的,和imprecise(不确切的、不明确的)意思相近;concise:简明扼要的;unpolished:未经修饰的;elementary:基本的、初级的。