环境毒物引起的“三致”作用是() ["致癌、致敏、致突变","致癌、致畸、致敏","致敏、致畸、致突变","致癌、致畸、致突变","致癌、致畸、致变应"]
河南大学由省立改为国立是什么时候?() ["1939","1940","1941","1942"]
雄黄的主成分是() ["三氧化二铁","四氧化三铁","硫化砷","三硫化二砷","四氧化三铅"]
中州大学的文科主任最早是?() ["林伯襄","冯友兰","曹理卿","吴芝圃"]
化学致癌过程促长阶段的特点为() ["不可逆性","对外源性化学物质极其敏感","核型紊乱","由细胞基因突变引起","剂量-反应可能检测不出阈剂量和最大效应剂量"]
试述冠心病心绞痛型发作时胸痛的特点。