问题：
[单选题]当时值得一提的有两件大事,一个是埃及工人对金属、陶瓷和燃料的实际知识,另一个是对早期的希腊哲学家的研究。()
A
At that time there were two important things worth mentioning,which are the practical knowledge of the Egyptian workers in metals, pottery and dyes and the study of earlier Greek philosophers.
B
At that time there were two important things worth mentioning: one was the practical knowledge of the Egyptian workers in metals, pottery and dyes; the other was the study of earlier Greek philosophers.
