第13题: [单项选择]The world's governments have done ________ nothing to combat the threat of nuclear accident. A. inherently B. vitally C. virtually D. identically 参考答案:C 答案解析:[解析] A.inherently固有地,天生地;B. vitally至关重要地,不可缺少地;C.virtually实际上,基本上; D.identically相同地。根据题意应选C。句意为:世界各国