灭火的基本方法有哪些?
参考答案：
一、冷却灭火二、隔离灭火三、窒息灭火四、化学抑制灭火
Miss Jones _______ music at Bardon School for five years when she was abroad and now she is
an actress.[ ]
A. taught
B. has taught
C. had taught
D. has been teaching
患者男性，31岁，诉头昏乏力半年余。血常规：白细胞6×109/L，分类正常，血小板100×109/L，血红蛋白70g/L，有反复痔疮出血史2年。缺铁性贫血被证实，予以口服铁剂治疗，为根治贫血，同时建议他应进行的治疗是（）
A.长期铁剂治疗
B.输血
C.治疗痔疮
D.多食富含铁的食物
E.常做大便潜血试验
