Early Life

    Stephen Hawking was born in Oxford, England on January 8, 1942. He____in a highly educated family. Stephen enjoyed math and science in school where he earned the nickname “Einstein.” He wanted to study math at university but Oxford didn't have a math ____at the time so he chose physics and chemistry instead. Stephen found college coursework to be very easy.  He enjoyed being a member of the schools boat club____ classical music. In October 1962 he started his graduate course at Trinity Hall. It was at this time that his illness started to show up. His speech became unclear and he became very clumsy, often dropping ____ or falling for no reason. However, he finished his PhD and wrote about black holes in his graduation paper.

4. 某档案馆的保密室进出门有下列要求：甲、乙两资料员必须同时用各自的钥匙(S_甲、S_乙分别表示甲、乙两资料员的钥匙)使灯亮才能进入保密室；而馆长只要用自己的钥匙(S_馆长表示馆长的钥匙)使灯亮就可以进入保密室。下列电路中符合上述要求的是 _{(       )}

填入下面横线上的语句语序排列最恰当的一项是（    ）

    我仰视天空，_____________，____________，____________。

①这场残酷的战争也会告终。

②和平与安祥会重新回来

③冥冥之中觉得世界还能好转