填空题

The important metallic chemical element in making stainless steel is ______.

【参考答案】

chromium
<上一题 目录 下一题>
热门 试题

填空题
Dunlop gave up his veterinary profession soon after he saw the immense possibilities of fitting the pneumatic tires to bicycles and tricycles.
填空题
Dr. Alexander Fleming was experimenting with a culture of deadly bacteria when he discovered the antibiotic penicillin —a special mould he had cultivated all by himself.
相关试题