整个胃肠道具有某些共同的结构特点.The entire gastrointestinal canal presents certain common structural characteristics.急性溃疡形成是显著的胃肠出血的起因.Acute ulcerations were responsible for significant gastrointestinal bleeding.一例17 岁 男孩,有胃肠功能不良史,主诉腹痛...
In this paper a new method on the dimethyl malonate has been proposed.本文通过对丙二酸二甲酯合成新方法的研究,收率达到80%以上.Aside from removing the malonate, how can this inhibition of respiration be overcome? Explain.除了去掉丙二酸之外, 还可以怎样克服这种对呼吸作用的...