典型苯丙酮尿症最主要的治疗方法是给予
A．低苯丙氨酸饮食B．酪氨酸C．四氢生物蝶呤D．5-羟色胺E．左旋多巴
参考答案：A
The first lab of experimental psychology was set up at university of Leipzig, Germany, in 1879. It announced the official birth of______.
请说明辩证与施护之间的联系？
