1,4-二氢吡啶环的2位为2-氨基乙氧基甲基,外消旋体和左旋体均已用于临床的药物是 ()

培养幼儿语言能力的关键是( )
患者 ,男,40岁 。小便频急,茎中热痛,刺痒不适,尿色黄浊,尿末或大便时有白浊滴出,会阴 、腰骶、睾丸有明显的胀痛不适,舌红苔黄根腻,脉弦滑。诊为慢性前列腺炎,其证候是
It was the training that he had as a young man ________made him such a good orator.