The automobile brake pad is a semimetal ceramic base automobile brake pad with high safety and reliability, and a preparation method is simple and reliable.

本发明是一种安全性和可靠性高的半金属陶瓷基汽车刹车片，其制备方法简单可靠。

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What's the best way to whisk astronauts to safety if their rocket were to explode on the launch pad?

如果航天员乘坐的火箭即将在发射台上爆炸，那最好的逃生方式是什么？

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