下列主要引起纤维性疾病的毒物是()。 ["一氧化碳、二氧化硫","甲基汞","农药中毒","粉尘","石油裂解气"]
下列药材可以采用微量升华实验进行鉴定的是() ["A.黄连","B.川乌","C.牛膝","D.大黄","E.何首乌"]
肉毒梭菌的形态() ["蝌蚪形","逗点状或S形","球拍状","葡萄样","螺旋状"]
幽门螺杆菌的形态() ["蝌蚪形","逗点状或S形","球拍状","葡萄样","螺旋状"]
下列关于慢性中度苯中毒的诊断指标中,错误的是()。 ["长期苯接触史","白细胞数在4.0~4.5×109/L,血小板低于8.0×109/L","白细胞低于3.0×109/L","白细胞数低于4.0×109/L,血小板低于60×109/L","有明显出血倾向,齿龈、皮肤、黏膜下出血"]
修剪树木,应保证在修剪周期内()符合上述规定的数值。