第30题: [单项选择]The key of the United States medical policy is ______. A. to establish more child health centers B. to make efforts to keep diseases from happening C. to grant more funds to train more para-professionals D. to put emphases on producing more effective medicines 参考答案:B 答案解析:推断题。关键句是文章最后一段,preventive medicine“预防医学;预防药”,B.意为“努力防止疾病的发生”。因此,B.的意思相符。