题目内容

Nowadays, with the development of globalization, exchanges among nations are becoming even more frequent.

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As everybody knows, art has no boundary. It involves many factors from different cultures.

So learning English can broaden your horizons and contribute to your professional development.

Excellent English will exert a great and long-term influence on art students' career and future.

泡沫产生器固定安装在储罐上，并由泡沫混合液管道与防火堤外接口相连的是（）泡沫灭火系统。

A. 固定式
B. 半固定式
C. 半移动式
D. 移动式