铁丝在氧气中燃烧______.
铁丝在点燃的条件下生成四氧化三铁,故答案为:铁+氧气点燃四氧化三铁.
The performance of this reasonably priced digital camera is _____ in quality to that of more expensive ones.
A.beneficial
B.fundamental
C.comparable
D.competitive
患者男性,28岁,右颈部淋巴结结核。下列药物哪种对治疗无效
A.青霉素
B.链霉素
C.异烟肼
D.利福平
E.乙胺丁醇