单选题 The interactions between China and the US will surely have a significant ______ on peace and stability in the A sia-Pacific region and the world as a whole.
【正确答案】 C
【答案解析】本题考的是形容词与名词的搭配。A项意为“重要性”，B项意为“印象”，C项意为“冲击、影响”，D项意为“含义”。根据题意，选项C为正确答案。