Corrosives are generally toxic, so follow the precautions cited in the following section on toxics.腐蚀剂一般来说是有毒的, 所以请遵守下文关于毒品的防范措施.Objective To evaluate the diagnostic methods and treatment of gastric ulcer perforating wit...
He continued to hold a lead in Angola's presi-dential race.他继续在安哥拉总统大选中占据领先地位。Angola was once a Portuguese territory.安哥拉曾经是葡萄牙的领土.Today, Angola mysterious existence of large, single or not is still doubtful.时至今日, 安哥...