A. there is no hierarchy of languages B. the hierarchy of languages is difficult to understand C. all languages came from grunts and groans D. Western languages are superior to Eastern languages 参考答案:A 答案解析:细节题。根据文章第二段to the professional linguist there is no intrinsic hierarchy among languages(对语言学家而言,.语言没
第21题: [单项选择]减小再生压力应() A. 开大双动滑阀 B. 关小双动滑阀 C. 维持其开度不变 参考答案:A